Company lists · Data refreshed September 2026

Top 25 Nonprofit legal advocacy firms based in the United States

RevenueBase identified 1,661 company matches for nonprofit legal advocacy firms associated with the United States as of September 2026 and tracks 31,059 professional contacts across them, including 13,627 with verified work emails. Washington is the largest hub.

This list covers company matches for nonprofit legal advocacy firms 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 20, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 20, 2026 How this list was built
1,661Companies
31,059Contacts tracked
13,627Verified emails
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The 25 largest nonprofit legal advocacy firms based in the United States

Ranked by team size
Top 25 of 1,661 company matches for nonprofit legal advocacy firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchColumbia, SC, United StatesHQ recorded Sep 20, 20261,001-5,0002,012 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
2Exact matchBrooklyn, NY, United StatesHQ recorded Sep 20, 2026501-1,000500 contacts →

Exact match

“Brooklyn Defender Services is a public defense office whose mission is to provide outstanding representation and advocacy free of cost to people facing loss of freedom, family…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
3Exact matchTukwila, WA, United StatesHQ recorded Sep 20, 2026501-1,000388 contacts →

Exact match

“Alexandra Lozano Immigration Law transforms the lives of immigrants and their families!”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4Exact matchNew York, NY, United StatesHQ recorded Sep 20, 2026501-1,000378 contacts →

Exact match

“Legal Services NYC fights poverty and seeks justice for low-income New Yorkers.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
5Exact matchBaltimore, MD, United StatesHQ recorded Sep 20, 2026201-500298 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
6Exact matchLos Angeles, CA, United StatesHQ recorded Sep 20, 202651-200257 contacts →

Exact match

“Legal Aid Foundation of Los Angeles achieves justice for people living in poverty across Los Angeles County.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
7Exact matchEdison, NJ, United StatesHQ recorded Sep 20, 2026201-500247 contacts →

Exact match

“Legal Services of New Jersey (LSNJ), an independent, non-profit organization, coordinates the statewide Legal Services system.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8Exact matchGlendale, CA, United StatesHQ recorded Sep 20, 202651-200240 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9Exact matchWashington, DC, United StatesHQ recorded Sep 20, 202651-200236 contacts →

Exact match

“Cohen Milstein Sellers & Toll LLP champions the causes of real people-workers, consumers, small business owners, investors, and whistleblowers-working to deliver corporate reforms…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10Exact matchModesto, CA, United StatesHQ recorded Sep 20, 2026201-500230 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11Exact matchSeattle, WA, United StatesHQ recorded Sep 20, 2026201-500226 contacts →

Exact match

“As a dynamic statewide law firm, NJP pursues its mission through legal advice and representation, community partnerships, and education to empower clients and combat injustice in…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12Exact matchArlington, VA, United StatesHQ recorded Sep 20, 202651-200206 contacts →

Exact match

“Through strategic litigation, training, communication, activism and research, the Institute for Justice advances a rule of law under which individuals can control their destinies…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
13Exact matchRockford, IL, United StatesHQ recorded Sep 20, 202651-200198 contacts →

Exact match

“Prairie State Legal Services (PSLS) is a nonprofit law firm, serving 36 counties throughout Northern and Central Illinois.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14Exact matchLos Angeles, CA, United StatesHQ recorded Sep 20, 202651-200188 contacts →

Exact match

“Liebert Cassidy Whitmore serves as trusted advisors to public agencies, educational institutions, and nonprofits across California.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15Exact matchWhite Plains, NY, United StatesHQ recorded Sep 20, 202651-200186 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16Exact matchOklahoma City, OK, United StatesHQ recorded Sep 20, 202651-200185 contacts →

Exact match

“Legal Aid Services of Oklahoma is a non-profit law firm.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17Exact matchLos Angeles, CA, United StatesHQ recorded Sep 20, 202651-200183 contacts →

Exact match

“Public Counsel is a nonprofit public interest law firm dedicated to advancing civil rights and racial and economic justice, as well as to amplifying the power of our clients…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18Exact matchOakland, CA, United StatesHQ recorded Sep 20, 202651-200179 contacts →

Exact match

“Bay Area Legal Aid (BayLegal) ensures fairness in the civil justice system for the most vulnerable members of our community.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19Exact matchLos Angeles, CA, United StatesHQ recorded Sep 20, 202651-200174 contacts →

Exact match

“Founded in 1974, Bet Tzedek pursues equal justice for all by providing high-quality, free legal services to the unhoused, undocumented immigrants, LGBTQIA+ community, low-wage…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20Exact matchPortland, OR, United StatesHQ recorded Sep 20, 202651-200166 contacts →

Exact match

“Metropolitan Public Defender has been on the cutting edge of public defense since our inception in 1971.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
21Exact matchSacramento, CA, United StatesHQ recorded Sep 20, 202651-200160 contacts →

Exact match

“Pacific Legal Foundation fights for Americans in court against unjust laws and regulations.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22Exact matchChicago, IL, United StatesHQ recorded Sep 20, 202651-200158 contacts →

Exact match

“DiCello Levitt LLP is one of the leading plaintiffs’ law firms in the United States.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23Exact matchWashington, DC, United StatesHQ recorded Sep 20, 202651-200155 contacts →

Exact match

“Zuckerman Spaeder LLP is consistently recognized as a leading national litigation boutique.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24Exact matchCleveland, OH, United StatesHQ recorded Sep 20, 202651-200149 contacts →

Exact match

“Legal Aid’s mission is to secure justice, equity, and access to opportunity for and with people who have low incomes through passionate legal representation and advocacy for…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25Exact matchNew York, NY, United StatesHQ recorded Sep 20, 202651-200146 contacts →

Exact match

“True pioneers often set out with limited resources, no clear path and no instructions.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase

Showing 25 of 1,661 nonprofit legal advocacy firms based in the United States

See the full list, filter by size, metro and specialty, and access 13,627 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Nonprofit legal advocacy firms based in the United States at a glance

As of Sep 20, 2026
43.9%Verified-email coverage
18.7Average contacts per company
1-10Median size (employees)
4.8%Largest-city concentration · Washington
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
1,056
11-50
428
51-200
153
201-500
13
501-1,000
5
1,001-5,000
2
10001+
1

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 1,661 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 “nonprofit legal advocacy firms” 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 13,627 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 20, 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 “nonprofit legal advocacy firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many nonprofit legal advocacy firms are there based in the United States?

RevenueBase identified 1,661 company matches for nonprofit legal advocacy firms 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?

Nelson Mullins Riley & Scarborough tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most nonprofit legal advocacy firms?

Washington leads with 80 company records, followed by New York (75) and Chicago (52).

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 13,627 professional contacts with verified work emails tracked across these 1,661 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 20, 2026.

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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.