Company lists · Data refreshed September 2026

Top 25 Public interest law firms based in the United States

Name: Public interest law firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 2,700 companies tracked

RevenueBase identified 2,700 public interest law firms headquartered in the United States as of September 2026 and tracks 37,483 professional contacts across them, including 16,346 with verified work emails. New York is the largest hub.

This list covers public interest 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 14, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 14, 2026 86% judged on-target in blind review

2,700Companies

37,483Contacts tracked

16,346Verified emails

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The 25 largest public interest law firms based in the United States

Ranked by team size

Top 25 of 2,700 public interest law firms based in the United States, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to public interest law firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Nelson Mullins Riley & Scarborough	Partial evidence	Columbia, SC, United StatesHQ checked Sep 14, 2026	1,001-5,000	2,012 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 14, 2026
2	Manatt, Phelps & Phillips, LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 14, 2026	501-1,000	1,085 contacts →
	Indirect evidence “Forget everything you thought you knew about professional services firms.” Source: RevenueBase Database · checked Sep 14, 2026
3	The United Firm LA Liga Defensora, APC	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 14, 2026	1,001-5,000	518 contacts →
	Indirect evidence “The United Firm \| La Liga Defensora, A.P.C.” Source: RevenueBase Database · checked Sep 14, 2026
4	NEW York Legal Assistance Group	Indirect evidence	New York, NY, United StatesHQ checked Sep 14, 2026	201-500	444 contacts →
	Indirect evidence “New York Legal Assistance Group (NYLAG) is a leading civil legal services organization combatting economic, racial, and social injustices by advocating for people experiencing…” Source: RevenueBase Database · checked Sep 14, 2026
5	Alexandra Lozano Immigration LAW Pllc	Partial evidence	Tukwila, WA, United StatesHQ checked Sep 14, 2026	501-1,000	388 contacts →
	Partial evidence “Alexandra Lozano Immigration Law transforms the lives of immigrants and their families!” Source: RevenueBase Database · checked Sep 14, 2026
6	Legal Services NYC	Indirect evidence	New York, NY, United StatesHQ checked Sep 14, 2026	501-1,000	378 contacts →
	Indirect evidence “Legal Services NYC fights poverty and seeks justice for low-income New Yorkers.” Source: RevenueBase Database · checked Sep 14, 2026
7	Maryland Legal AID	Partial evidence	Baltimore, MD, United StatesHQ checked Sep 14, 2026	201-500	298 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 14, 2026
8	Community Legal Services Of Philadelphia	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 14, 2026	51-200	290 contacts →
	Indirect evidence “Community Legal Services (CLS) is nationally recognized as a model legal services program.” Source: RevenueBase Database · checked Sep 14, 2026
9	Connell Foley LLP	Indirect evidence	Roseland, NJ, United StatesHQ checked Sep 14, 2026	201-500	288 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 14, 2026
10	Chisholm Chisholm & Kilpatrick LTD	Partial evidence	Providence, RI, United StatesHQ checked Sep 14, 2026	201-500	273 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 14, 2026
11	Neighborhood Defender Service	Partial evidence	New York, NY, United StatesHQ checked Sep 14, 2026	51-200	268 contacts →
	Partial evidence “Neighborhood Defender Service (NDS) is known nationally and internationally for its innovative, community-based, holistic public defense practice.” Source: RevenueBase Database · checked Sep 14, 2026
12	Legal AID Foundation Of LOS Angeles	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 14, 2026	51-200	257 contacts →
	Indirect evidence “Legal Aid Foundation of Los Angeles achieves justice for people living in poverty across Los Angeles County.” Source: RevenueBase Database · checked Sep 14, 2026
13	Neighborhood Legal Services Of LOS Angeles County	Indirect evidence	Glendale, CA, United StatesHQ checked Sep 14, 2026	51-200	240 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 14, 2026
14	Cohen Milstein Sellers & Toll LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	51-200	236 contacts →
	Indirect evidence “Cohen Milstein Sellers & Toll LLP champions the causes of real people-workers, consumers, small business owners, investors, and whistleblowers-working to deliver corporate reforms…” Source: RevenueBase Database · checked Sep 14, 2026
15	California Rural Legal Assistance, INC	Partial evidence	Modesto, CA, United StatesHQ checked Sep 14, 2026	201-500	230 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 14, 2026
16	Foster Swift Collins & Smith, PC	Partial evidence	Lansing, MI, United StatesHQ checked Sep 14, 2026	201-500	222 contacts →
	Partial evidence “Foster Swift has helped businesses, public entities, families, and individuals navigate legal challenges and discover opportunities across Michigan for more than 120 years.” Source: RevenueBase Database · checked Sep 14, 2026
17	Heplerbroom LLC	Indirect evidence	Edwardsville, IL, United StatesHQ checked Sep 14, 2026	201-500	217 contacts →
	Indirect evidence “HeplerBroom LLC is committed to bringing Excellence, Results, and Integrity to everything we do.” Source: RevenueBase Database · checked Sep 14, 2026
18	Legal AID Society Of SAN Diego	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 14, 2026	201-500	208 contacts →
	Indirect evidence “The Legal Aid Society of San Diego is a proud, committed and compassionate group of people dedicated to providing equal access to justice for poor people through aggressive…” Source: RevenueBase Database · checked Sep 14, 2026
19	Institute For Justice	Partial evidence	Arlington, VA, United StatesHQ checked Sep 14, 2026	51-200	206 contacts →
	Partial evidence “Through strategic litigation, training, communication, activism and research, the Institute for Justice advances a rule of law under which individuals can control their destinies…” Source: RevenueBase Database · checked Sep 14, 2026
20	Coblentz Patch Duffy & Bass LLP	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 14, 2026	51-200	200 contacts →
	Indirect evidence “Like most respected firms, we have many ways to tout our skill, our experience, and our results.” Source: RevenueBase Database · checked Sep 14, 2026
21	Prairie State Legal Services INC	Partial evidence	Rockford, IL, United StatesHQ checked Sep 14, 2026	51-200	198 contacts →
	Partial evidence “Prairie State Legal Services (PSLS) is a nonprofit law firm, serving 36 counties throughout Northern and Central Illinois.” Source: RevenueBase Database · checked Sep 14, 2026
22	Lozano Smith	Indirect evidence	Fresno, CA, United StatesHQ checked Sep 14, 2026	201-500	197 contacts →
	Indirect evidence “For more than 30 years, Lozano Smith has served as a recognized leader committed to providing innovative and tailored legal solutions that cannot be found elsewhere.” Source: RevenueBase Database · checked Sep 14, 2026
23	Fagen Friedman & Fulfrost LLP F3 LAW	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 14, 2026	201-500	194 contacts →
	Partial evidence “Fagen Friedman & Fulfrost, LLP ("F3Law") is a full-service education law firm representing more than 500 educational institutions, including school districts, community college…” Source: RevenueBase Database · checked Sep 14, 2026
24	Liebert Cassidy Whitmore	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 14, 2026	51-200	188 contacts →
	Partial evidence “Liebert Cassidy Whitmore serves as trusted advisors to public agencies, educational institutions, and nonprofits across California.” Source: RevenueBase Database · checked Sep 14, 2026
25	Legal AID Services Of Oklahoma	Partial evidence	Oklahoma City, OK, United StatesHQ checked Sep 14, 2026	51-200	185 contacts →
	Partial evidence “Legal Aid Services of Oklahoma is a non-profit law firm.” Source: RevenueBase Database · checked Sep 14, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: public interest law firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names public interest law firms.
Partial evidence: Its own public description names part of public interest law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name public interest law firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 2,700 public interest law firms based in the United States

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Public interest law firms based in the United States at a glance

As of Sep 14, 2026

43.6%Verified-email coverage

13.9Average contacts per company

1-10Median size (employees)

4.4%Largest-city concentration · New York

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

1,858

11-50

641

51-200

154

201-500

501-1,000

1,001-5,000

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 2,700 companies.

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 public interest law firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, 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 “public interest law firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names public interest law firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among public interest 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 its RevenueBase Smart Search 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, 16,346 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 14, 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.

Public interest law firms by metro

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names public interest law firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many public interest law firms are there based in the United States?

RevenueBase identified 2,700 public interest 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 public interest law firms?

New York leads with 119 headquartered companies, followed by Chicago (73) and Los Angeles (70).

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 16,346 verified decision-maker contacts tracked across these 2,700 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 14, 2026.

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Public interest law firms by geography

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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 Smart Search, 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.