Company lists · Data refreshed September 2026
Top 25 Nonprofit law firms based in the United States
RevenueBase identified 1,705 nonprofit law firms headquartered in the United States as of September 2026 and tracks 37,577 professional contacts across them, including 16,667 with verified work emails and 16,774 with mobile numbers. Washington is the largest hub.
This list covers nonprofit law firms headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 nonprofit law firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,012 | ||||
“Established in 1897, Nelson Mullins is an Am Law 100 firm of more than attorneys, policy advisors and professionals with 33 offices in 17 states and Washington, D.C.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,790 | ||||
“Committed to Your Success – As a law firm of more than 900 professionals, Venable delivers legal services globally in every area of regulatory compliance, government affairs…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,720 | ||||
“Dinsmore & Shohl LLP has a nationwide team of more than 750 attorneys who are trusted advisers to Fortune 500 companies, institutions, associations, governments, professional…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,682 | ||||
“Ballard Spahr LLP, an Am Law 100 law firm with more than 750 lawyers in 19 U.S.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | Saul Ewing LLPIndirect evidence | 916 | |||
“Inspired People.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 815 | ||||
“Established in 1989, Hall Booth Smith, P.C.(HBS) is a full-service law firm with 33 offices across the United States.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 775 | ||||
“THE NONPROFIT ACCOUNTING SPECIALISTS.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 482 | ||||
“At Reinhart Boerner Van Deuren, we know that every trusted relationship begins with understanding.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 386 | ||||
“We're an award-winning, midsized law firm that brings BigLaw insights and talent and marries it with collaboration and value beyond the numbers.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 353 | ||||
“Neal Gerber Eisenberg is a Chicago-based law firm whose attorneys share a culture of teamwork and devotion to personalized client service to advance our clients’ business…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | Maryland Legal AIDStrong evidence | 298 | |||
“Maryland Legal Aid (MLA) is a statewide private, nonprofit law firm that provides free, civil legal services to low-income and vulnerable people to address their most fundamental…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 288 | ||||
“Since 1938, Connell Foley LLP has been unwavering in its commitment to meeting the needs of clients, employees, and the community while maintaining the highest ethical standards…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 273 | ||||
“Chisholm Chisholm & Kilpatrick LTD is a law firm offering an array of highly effective services tailored to clients’ needs in the areas of Veterans Law, Long-Term Disability &…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 262 | ||||
“As a national full-service accounting and advisory firm exclusively serving nonprofit organizations, CapinCrouse provides professional solutions to organizations whose outcomes…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 240 | ||||
“Founded in 1933, Dilworth Paxson conducts a broad and diverse regional law practice representing a wide variety of clients ranging from Fortune 500 companies to closely-held…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | Neighborhood Legal Services Of LOS Angeles CountyIndirect evidence | 240 | |||
“Each year Neighborhood Legal Services of Los Angeles County (NLSLA) provides free assistance to more than individuals and families through innovative projects that expand access…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 230 | ||||
“California Rural Legal Assistance, Inc.(CRLA) is an anti-poverty law firm that dismantles unjust systems through community lawyering in California’s historically rural areas.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 227 | ||||
“Arabella Advisors is a professional services firm that provides administrative, operational, and strategic support to nonprofits, foundations, and individual donors.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 222 | ||||
“Foster Swift has helped businesses, public entities, families, and individuals navigate legal challenges and discover opportunities across Michigan for more than 120 years.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 200 | ||||
“Like most respected firms, we have many ways to tout our skill, our experience, and our results.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | Prairie State Legal Services INCStrong evidence | 198 | |||
“Prairie State Legal Services (PSLS) is a nonprofit law firm, serving 36 counties throughout Northern and Central Illinois.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 192 | ||||
“As a collaborative and integrated group of attorneys, we work as a unified team, not as sole practitioners.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | 190 | ||||
“Baird Holm LLP's integrated team of 96 attorneys, licensed in 22 states, is committed to connecting each of its valued clients to the positive outcomes they seek.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | Legal Services Of The Hudson ValleyIndirect evidence | 186 | |||
“The mission of Legal Services of the Hudson Valley is to provide free, high quality counsel in civil matters for poor and low-income individuals and families who cannot afford to…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | Legal AID Services Of OklahomaPartial evidence | 185 | |||
“Legal Aid Services of Oklahoma is a non-profit law firm.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 1,705 nonprofit law firms based in the United States
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Nonprofit law firms based in the United States at a glance
As of Sep 5, 2026Companies by employee count
Verified emails by last verification
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among nonprofit law firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.
- 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
- Companies headquartered in the United States whose own description of what they do matches “nonprofit law firms”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among nonprofit law firms, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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 listed company carries at least one verified work email, 16,667 across the full list. 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 5, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
How many nonprofit law firms are there based in the United States?
RevenueBase identified 1,705 nonprofit law firms headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Nelson Mullins Riley & Scarborough, headquartered in Columbia, tops this list with the largest team on record.
Which city has the most nonprofit law firms?
Washington leads with 63 headquartered companies, followed by New York (62) and Chicago (44).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 16,667 verified decision-maker contacts tracked across these 1,705 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 5, 2026.
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Nonprofit law firms by geography
- Nonprofit law firms based in Brazil
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- Nonprofit law firms based in Spain
- Nonprofit law firms based in the United Kingdom
- Nonprofit law firms based in Germany
- Nonprofit law firms based in the Netherlands
- Nonprofit law firms based in Poland
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- Nonprofit law firms based in Italy
- Nonprofit law firms based in Belgium
- Nonprofit law firms based in Chicago, United States
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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.