Company lists · Data refreshed September 2026
Top 25 Unions and employment organizations based in the United States
RevenueBase identified 240 company matches for unions and employment organizations associated with the United States as of September 2026 and tracks 19,453 professional contacts across them, including 2,432 with verified work emails. Washington is the largest hub.
This list covers company matches for unions and employment organizations associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 19, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest unions and employment organizations based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 9,357 contacts → | ||||
Exact match “The IBEW represents 901,831 active.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 2 | 1,406 contacts → | ||||
Exact match “We are the Service Employees International Union, an organization of 2-million members united by the belief in the dignity and worth of workers and the services they provide and…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 3 | 1,147 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 4 | 1,052 contacts → | ||||
Exact match “The Teamsters are one of North America’s largest, most diverse unions.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 5 | 983 contacts → | ||||
Exact match “AFSCME is the nation’s largest and fastest growing public services employees union.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 6 | 610 contacts → | ||||
Exact match “32BJ SEIU is the largest property service workers union in the country, representing more than office cleaners, security officers, doormen, porters, maintenance workers, bus…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 7 | 577 contacts → | ||||
Exact match “The AFT is a union of professionals that champions fairness; democracy; economic opportunity; and high-quality public education, healthcare and public services for our students…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 8 | 420 contacts → | ||||
Exact match “The AFL-CIO represents people who work.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 9 | 198 contacts → | ||||
Exact match “SEIU Local 721 is a dynamic, fast-growing organization recognized as one of the largest and strongest unions of publicly-funded employees in the nation.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 10 | 168 contacts → | ||||
Exact match “The MTA is the voice of teachers, faculty, professional staff and education support professionals working at public schools, colleges and universities across Massachusetts.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 11 | 101 contacts → | ||||
Exact match “SEIU Local 521 is on the cutting edge of progressive activism, building the power of workers and engaging in larger social justice issues such as immigration, racial and…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 12 | 100 contacts → | ||||
Exact match “We are an organization of more than people who, by joining together, are achieving what we cannot accomplish alone.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 13 | 81 contacts → | ||||
Exact match “SEIU Local 1 members are working in 11 cities in six states, and our jobs are some of the highest paying in our industries.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 14 | 80 contacts → | ||||
Exact match “Willig, Williams & Davidson is one of the largest and most respected union-side labor law firms in the United States.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 15 | 77 contacts → | ||||
Exact match “Members of UNITE HERE Local 11 join together to fight for improved living standards and working conditions.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 16 | 52 contacts → | ||||
Exact match “UFCW 8-Golden State is dedicated to maintaining, improving and enforcing collective bargaining agreements.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 17 | 45 contacts → | ||||
Exact match “The United Service Workers Union, IUJAT (USWU) can trace its origins back to a small independent labor organization, representing approximately members that was created in the…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 18 | 44 contacts → | ||||
Exact match “Oregon AFSCME Council 75 represents over workers statewide in both public and private sector and is one of the fastest growing unions in Oregon.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 19 | 41 contacts → | ||||
Exact match “We are a union representing over supermarket workers throughout Long Island, the five boroughs and Dutchess & Westchester Counties.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 20 | 39 contacts → | ||||
Exact match “At Cohen, Weiss and Simon LLP, we are proud of our reputation as one of the nation's leading firms devoted exclusively to the interests of labor and working people.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 21 | 39 contacts → | ||||
Exact match “With more than members nationwide across air, rail, gaming and transit divisions, TWU moves America.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 22 | 35 contacts → | ||||
Exact match “O'Donoghue & O'Donoghue LLP is one of the largest and oldest union-side law firms in the United States, with offices in Washington, D.C, Philadelphia, Pennsylvania, and Annapolis…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 23 | 34 contacts → | ||||
Exact match “A group of employees founded University Professional and Technical Employees (UPTE) in 1990, believing that workers across the University of California and at Lawrence Berkeley…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 24 | 29 contacts → | ||||
Exact match “A Law Firm For The People Who Keep America Working Weinberg, Roger & Rosenfeld is one of the nation’s leading firms representing unions and working people in all aspects of labor…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 25 | 28 contacts → | ||||
Exact match “Union representing public safety personnel at various Municipal and County Offices in their contract negotiations, grievances and other employment issues.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “unions and employment organizations”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 240 unions and employment organizations based in the United States
See the full list, filter by size, metro and specialty, and access 2,432 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Unions and employment organizations based in the United States at a glance
As of Sep 19, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 240 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with the United States whose business descriptions match “unions and employment organizations” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 2,432 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “unions and employment organizations”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many unions and employment organizations are there based in the United States?
RevenueBase identified 240 company matches for unions and employment organizations associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
International Brotherhood Of Electrical Workers Ibew tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most unions and employment organizations?
Washington leads with 19 company records, followed by New York (14) and Los Angeles (7).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 2,432 professional contacts with verified work emails tracked across these 240 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.
Ready to reach these companies? Verified emails and direct dials for all 240 unions and employment organizations based in the United States. Start with a free account, no credit card.
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Unions and employment organizations by geography
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Unions and employment organizations based in Canada
- AI companies based in the United States
- Cybersecurity companies based in the United States
- Manufacturing companies based in the United States
- Media companies based in the United States
- Oil and gas companies based in the United States
Company intelligence · public preview
Top 25 unions and employment organizations based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 240 matching company records for unions and employment organizations based in the United States, with 19,453 tracked contacts and 2,432 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 19, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 unions and employment organizations based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | HQ: Washington, DC, United StatesReported employees: 10001+ | Washington, DC, United States | 10001+ | Exact match | 9,357 contacts → |
“The IBEW represents 901,831 active.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | SEIUseiu.org HQ: Washington, DC, United StatesReported employees: 501-1,000 | Washington, DC, United States | 501-1,000 | Exact match | 1,406 contacts → |
“We are the Service Employees International Union, an organization of 2-million members united by the belief in the dignity and worth of workers and the services they provide and…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | LIUNAliuna.org HQ: Washington, DC, United StatesReported employees: 10001+ | Washington, DC, United States | 10001+ | Exact match | 1,147 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 4 | International Brotherhood Of Teamstersteamster.org HQ: Washington, DC, United StatesReported employees: 501-1,000 | Washington, DC, United States | 501-1,000 | Exact match | 1,052 contacts → |
“The Teamsters are one of North America’s largest, most diverse unions.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Afscmeafscme.orgHQ: Washington, DC, United StatesReported employees: 501-1,000 | Washington, DC, United States | 501-1,000 | Exact match | 983 contacts → |
“AFSCME is the nation’s largest and fastest growing public services employees union.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | 32bj Seiuseiu32bj.org HQ: New York, NY, United StatesReported employees: 201-500 | New York, NY, United States | 201-500 | Exact match | 610 contacts → |
“32BJ SEIU is the largest property service workers union in the country, representing more than office cleaners, security officers, doormen, porters, maintenance workers, bus…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  AFTaft.orgHQ: Washington, DC, United StatesReported employees: 201-500 | Washington, DC, United States | 201-500 | Exact match | 577 contacts → |
“The AFT is a union of professionals that champions fairness; democracy; economic opportunity; and high-quality public education, healthcare and public services for our students…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Afl-Cioaflcio.orgHQ: Washington, DC, United StatesReported employees: 51-200 | Washington, DC, United States | 51-200 | Exact match | 420 contacts → |
“The AFL-CIO represents people who work.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Seiu Local 721seiu721.org HQ: Los Angeles, CA, United StatesReported employees: 51-200 | Los Angeles, CA, United States | 51-200 | Exact match | 198 contacts → |
“SEIU Local 721 is a dynamic, fast-growing organization recognized as one of the largest and strongest unions of publicly-funded employees in the nation.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Massachusetts Teachers Associationmassteacher.org HQ: Quincy, MA, United StatesReported employees: 51-200 | Quincy, MA, United States | 51-200 | Exact match | 168 contacts → |
“The MTA is the voice of teachers, faculty, professional staff and education support professionals working at public schools, colleges and universities across Massachusetts.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Seiu Local 521seiu521.org HQ: San Jose, CA, United StatesReported employees: 51-200 | San Jose, CA, United States | 51-200 | Exact match | 101 contacts → |
“SEIU Local 521 is on the cutting edge of progressive activism, building the power of workers and engaging in larger social justice issues such as immigration, racial and…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Seiu Local 503seiu503.org HQ: Salem, OR, United StatesReported employees: 51-200 | Salem, OR, United States | 51-200 | Exact match | 100 contacts → |
“We are an organization of more than people who, by joining together, are achieving what we cannot accomplish alone.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Seiu Local 1seiu1.org HQ: Chicago, IL, United StatesReported employees: 51-200 | Chicago, IL, United States | 51-200 | Exact match | 81 contacts → |
“SEIU Local 1 members are working in 11 cities in six states, and our jobs are some of the highest paying in our industries.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Willig, Williams & Davidsonwwdlaw.comHQ: Philadelphia, PA, United StatesReported employees: 51-200 | Philadelphia, PA, United States | 51-200 | Exact match | 80 contacts → |
“Willig, Williams & Davidson is one of the largest and most respected union-side labor law firms in the United States.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Unite Here Local 11unitehere11.org HQ: Los Angeles, CA, United StatesReported employees: 11-50 | Los Angeles, CA, United States | 11-50 | Exact match | 77 contacts → |
“Members of UNITE HERE Local 11 join together to fight for improved living standards and working conditions.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Ufcw 8-Golden Stateufcw8.org HQ: Roseville, CA, United StatesReported employees: 51-200 | Roseville, CA, United States | 51-200 | Exact match | 52 contacts → |
“UFCW 8-Golden State is dedicated to maintaining, improving and enforcing collective bargaining agreements.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | HQ: New Rochelle, NY, United StatesReported employees: 51-200 | New Rochelle, NY, United States | 51-200 | Exact match | 45 contacts → |
“The United Service Workers Union, IUJAT (USWU) can trace its origins back to a small independent labor organization, representing approximately members that was created in the…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Oregon Afscme Council 75oregonafscme.org HQ: Portland, OR, United StatesReported employees: 51-200 | Portland, OR, United States | 51-200 | Exact match | 44 contacts → |
“Oregon AFSCME Council 75 represents over workers statewide in both public and private sector and is one of the fastest growing unions in Oregon.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Ufcw Local 1500ufcw1500.org HQ: Westbury, NY, United StatesReported employees: 51-200 | Westbury, NY, United States | 51-200 | Exact match | 41 contacts → |
“We are a union representing over supermarket workers throughout Long Island, the five boroughs and Dutchess & Westchester Counties.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Cohen, Weiss And Simon LLPcwsny.comHQ: New York, NY, United StatesReported employees: 11-50 | New York, NY, United States | 11-50 | Exact match | 39 contacts → |
“At Cohen, Weiss and Simon LLP, we are proud of our reputation as one of the nation's leading firms devoted exclusively to the interests of labor and working people.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | HQ: Washington, DC, United StatesReported employees: Not recorded | Washington, DC, United States | Not recorded | Exact match | 39 contacts → |
“With more than members nationwide across air, rail, gaming and transit divisions, TWU moves America.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  O'donoghue & O'donoghue LLPodonoghuelaw.comHQ: Washington, DC, United StatesReported employees: 11-50 | Washington, DC, United States | 11-50 | Exact match | 35 contacts → |
“O'Donoghue & O'Donoghue LLP is one of the largest and oldest union-side law firms in the United States, with offices in Washington, D.C, Philadelphia, Pennsylvania, and Annapolis…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | UPTEupte.org HQ: Berkeley, CA, United StatesReported employees: 51-200 | Berkeley, CA, United States | 51-200 | Exact match | 34 contacts → |
“A group of employees founded University Professional and Technical Employees (UPTE) in 1990, believing that workers across the University of California and at Lawrence Berkeley…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Weinberg, Roger & Rosenfeldunioncounsel.net HQ: Alameda, CA, United StatesReported employees: 51-200 | Alameda, CA, United States | 51-200 | Exact match | 29 contacts → |
“A Law Firm For The People Who Keep America Working Weinberg, Roger & Rosenfeld is one of the nation’s leading firms representing unions and working people in all aspects of labor…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | HQ: Minneapolis, United StatesReported employees: 11-50 | Minneapolis, United States | 11-50 | Exact match | 28 contacts → |
“Union representing public safety personnel at various Municipal and County Offices in their contract negotiations, grievances and other employment issues.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 240 company matches
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Unions and employment organizations: dataset insights
September 19, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
239 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 240 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 19, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for unions and employment organizations?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many unions and employment organizations did RevenueBase find based in the United States?
The saved snapshot records 240 matching company records, 19,453 tracked contacts and 2,432 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 19, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Unions and employment organizations by geography
Cite this list
RevenueBase Data Team. Top 25 unions and employment organizations based in the United States. Snapshot: September 19, 2026. https://revenuebase.ai/companies/unions-and-employment-organizations/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Unions and employment organizations based in Canada
- AI companies based in the United States
- Cybersecurity companies based in the United States
- Manufacturing companies based in the United States
- Media companies based in the United States
- Oil and gas companies based in the United States
Company intelligence · public preview
Top 25 unions and employment organizations based in the United States
RevenueBase records 240 matching company records for unions and employment organizations based in the United States, with 19,453 tracked contacts and 2,432 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 19, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 unions and employment organizations based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | HQ: Washington, DC, United StatesReported employees: 10001+ | Washington, DC, United States | 10001+ | Exact match | 9,357 contacts → |
“The IBEW represents 901,831 active.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | SEIUseiu.org HQ: Washington, DC, United StatesReported employees: 501-1,000 | Washington, DC, United States | 501-1,000 | Exact match | 1,406 contacts → |
“We are the Service Employees International Union, an organization of 2-million members united by the belief in the dignity and worth of workers and the services they provide and…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | LIUNAliuna.org HQ: Washington, DC, United StatesReported employees: 10001+ | Washington, DC, United States | 10001+ | Exact match | 1,147 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 4 | International Brotherhood Of Teamstersteamster.org HQ: Washington, DC, United StatesReported employees: 501-1,000 | Washington, DC, United States | 501-1,000 | Exact match | 1,052 contacts → |
“The Teamsters are one of North America’s largest, most diverse unions.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Afscmeafscme.org HQ: Washington, DC, United StatesReported employees: 501-1,000 | Washington, DC, United States | 501-1,000 | Exact match | 983 contacts → |
“AFSCME is the nation’s largest and fastest growing public services employees union.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | 32bj Seiuseiu32bj.org HQ: New York, NY, United StatesReported employees: 201-500 | New York, NY, United States | 201-500 | Exact match | 610 contacts → |
“32BJ SEIU is the largest property service workers union in the country, representing more than office cleaners, security officers, doormen, porters, maintenance workers, bus…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | AFTaft.org HQ: Washington, DC, United StatesReported employees: 201-500 | Washington, DC, United States | 201-500 | Exact match | 577 contacts → |
“The AFT is a union of professionals that champions fairness; democracy; economic opportunity; and high-quality public education, healthcare and public services for our students…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Afl-Cioaflcio.org HQ: Washington, DC, United StatesReported employees: 51-200 | Washington, DC, United States | 51-200 | Exact match | 420 contacts → |
“The AFL-CIO represents people who work.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Seiu Local 721seiu721.org HQ: Los Angeles, CA, United StatesReported employees: 51-200 | Los Angeles, CA, United States | 51-200 | Exact match | 198 contacts → |
“SEIU Local 721 is a dynamic, fast-growing organization recognized as one of the largest and strongest unions of publicly-funded employees in the nation.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Massachusetts Teachers Associationmassteacher.org HQ: Quincy, MA, United StatesReported employees: 51-200 | Quincy, MA, United States | 51-200 | Exact match | 168 contacts → |
“The MTA is the voice of teachers, faculty, professional staff and education support professionals working at public schools, colleges and universities across Massachusetts.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Seiu Local 521seiu521.org HQ: San Jose, CA, United StatesReported employees: 51-200 | San Jose, CA, United States | 51-200 | Exact match | 101 contacts → |
“SEIU Local 521 is on the cutting edge of progressive activism, building the power of workers and engaging in larger social justice issues such as immigration, racial and…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Seiu Local 503seiu503.org HQ: Salem, OR, United StatesReported employees: 51-200 | Salem, OR, United States | 51-200 | Exact match | 100 contacts → |
“We are an organization of more than people who, by joining together, are achieving what we cannot accomplish alone.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Seiu Local 1seiu1.org HQ: Chicago, IL, United StatesReported employees: 51-200 | Chicago, IL, United States | 51-200 | Exact match | 81 contacts → |
“SEIU Local 1 members are working in 11 cities in six states, and our jobs are some of the highest paying in our industries.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Willig, Williams & Davidsonwwdlaw.com HQ: Philadelphia, PA, United StatesReported employees: 51-200 | Philadelphia, PA, United States | 51-200 | Exact match | 80 contacts → |
“Willig, Williams & Davidson is one of the largest and most respected union-side labor law firms in the United States.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Unite Here Local 11unitehere11.org HQ: Los Angeles, CA, United StatesReported employees: 11-50 | Los Angeles, CA, United States | 11-50 | Exact match | 77 contacts → |
“Members of UNITE HERE Local 11 join together to fight for improved living standards and working conditions.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Ufcw 8-Golden Stateufcw8.org HQ: Roseville, CA, United StatesReported employees: 51-200 | Roseville, CA, United States | 51-200 | Exact match | 52 contacts → |
“UFCW 8-Golden State is dedicated to maintaining, improving and enforcing collective bargaining agreements.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | HQ: New Rochelle, NY, United StatesReported employees: 51-200 | New Rochelle, NY, United States | 51-200 | Exact match | 45 contacts → |
“The United Service Workers Union, IUJAT (USWU) can trace its origins back to a small independent labor organization, representing approximately members that was created in the…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Oregon Afscme Council 75oregonafscme.org HQ: Portland, OR, United StatesReported employees: 51-200 | Portland, OR, United States | 51-200 | Exact match | 44 contacts → |
“Oregon AFSCME Council 75 represents over workers statewide in both public and private sector and is one of the fastest growing unions in Oregon.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Ufcw Local 1500ufcw1500.org HQ: Westbury, NY, United StatesReported employees: 51-200 | Westbury, NY, United States | 51-200 | Exact match | 41 contacts → |
“We are a union representing over supermarket workers throughout Long Island, the five boroughs and Dutchess & Westchester Counties.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Cohen, Weiss And Simon LLPcwsny.com HQ: New York, NY, United StatesReported employees: 11-50 | New York, NY, United States | 11-50 | Exact match | 39 contacts → |
“At Cohen, Weiss and Simon LLP, we are proud of our reputation as one of the nation's leading firms devoted exclusively to the interests of labor and working people.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | HQ: Washington, DC, United StatesReported employees: Not recorded | Washington, DC, United States | Not recorded | Exact match | 39 contacts → |
“With more than members nationwide across air, rail, gaming and transit divisions, TWU moves America.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | O'donoghue & O'donoghue LLPodonoghuelaw.com HQ: Washington, DC, United StatesReported employees: 11-50 | Washington, DC, United States | 11-50 | Exact match | 35 contacts → |
“O'Donoghue & O'Donoghue LLP is one of the largest and oldest union-side law firms in the United States, with offices in Washington, D.C, Philadelphia, Pennsylvania, and Annapolis…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | UPTEupte.org HQ: Berkeley, CA, United StatesReported employees: 51-200 | Berkeley, CA, United States | 51-200 | Exact match | 34 contacts → |
“A group of employees founded University Professional and Technical Employees (UPTE) in 1990, believing that workers across the University of California and at Lawrence Berkeley…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Weinberg, Roger & Rosenfeldunioncounsel.net HQ: Alameda, CA, United StatesReported employees: 51-200 | Alameda, CA, United States | 51-200 | Exact match | 29 contacts → |
“A Law Firm For The People Who Keep America Working Weinberg, Roger & Rosenfeld is one of the nation’s leading firms representing unions and working people in all aspects of labor…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | HQ: Minneapolis, United StatesReported employees: 11-50 | Minneapolis, United States | 11-50 | Exact match | 28 contacts → |
“Union representing public safety personnel at various Municipal and County Offices in their contract negotiations, grievances and other employment issues.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 240 company matches
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Unions and employment organizations: dataset insights
September 19, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
239 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 240 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 19, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for unions and employment organizations?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many unions and employment organizations did RevenueBase find based in the United States?
The saved snapshot records 240 matching company records, 19,453 tracked contacts and 2,432 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 19, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Unions and employment organizations by geography
Cite this list
RevenueBase Data Team. Top 25 unions and employment organizations based in the United States. Snapshot: September 19, 2026. https://revenuebase.ai/companies/unions-and-employment-organizations/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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