Company lists · Data verified August 2026

Top 25 Constitutional law firms based in the United States

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 3,325 companies tracked

There are 3,325 constitutional law firms headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 52,680 professional contacts across them, including 27,172 with verified work emails and 27,529 with mobile numbers. New York is the largest hub.

This list covers constitutional 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. Data current as of August 28, 2026.

3,325Companies

52,680Contacts tracked

27,172Verified emails

27,529Mobile numbers

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The 25 largest constitutional law firms based in the United States

Ranked by team size

Top 25 of 3,325 constitutional law firms based in the United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Gordon Rees Scully Mansukhani, LLP	San Francisco, CA	1,001-5,000	2,807	1,880
2	Nelson Mullins Riley & Scarborough	Columbia, SC	1,001-5,000	2,036	1,215
3	Venable LLP	Washington, DC	1,001-5,000	1,791	1,184
4	ACLU	NY	501-1,000	1,077	531
5	Quintairos, Prieto, Wood & Boyer, P.A	Jacksonville, FL	1,001-5,000	1,060	726
6	Kelley Drye & Warren LLP	Los Angeles, CA	501-1,000	686	450
7	Grayrobinson, P.A	Miami, FL	501-1,000	673	403
8	Honigman LLP	Kalamazoo, MI	501-1,000	666	525
9	Wiley Rein LLP	Washington, DC	501-1,000	576	395
10	Munger, Tolles & Olson LLP	San Francisco, CA	201-500	528	320
11	Gunster	Miami, FL	501-1,000	522	378
12	The United Firm LA Liga Defensora, APC	Austin, TX	1,001-5,000	511	41
13	Kelley Kronenberg	Daytona Beach, FL	501-1,000	476	352
14	Dickie, Mccamey & Chilcote	Charlotte, NC	201-500	406	269
15	Resnick & Louis, P.C.	Irvine, CA	501-1,000	338	275
16	Nossaman LLP	Tucson, AZ	201-500	332	217
17	Richards, Layton & Finger	Wilmington, DE	201-500	317	221
18	Mcnees Wallace & Nurick	Lancaster, PA	201-500	315	205
19	Schiff Hardin LLP	Chicago, IL	501-1,000	297	69
20	Maynard Nexsen	Los Angeles, CA	501-1,000	294	149
21	Manning Kass	San Francisco, CA	201-500	287	114
22	Messerli Kramer, P.A	Minneapolis, MN	201-500	286	146
23	Margolis Edelstein	Wilimington	201-500	279	179
24	Weinberg Wheeler Hudgins Gunn & Dial	Birmingham, AL	201-500	263	153
25	Swanson, Martin & Bell, LLP	Edwardsville, IL	201-500	259	158

Showing 25 of 3,325 constitutional law firms based in the United States

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Constitutional law firms based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 152 HQs

27,529Contacts with mobile numbers

127Emails re-verified in last 30 days

Companies by employee count

1-10

2,117

11-50

941

51-200

200

201-500

501-1,000

1,001-5,000

Constitutional law firms by metro

Metro	Companies
Constitutional law firms in New York	152
Constitutional law firms in Washington	94
Constitutional law firms in Los Angeles	72
Constitutional law firms in Chicago	70
Constitutional law firms in Houston	63
Constitutional law firms in Atlanta	53
Constitutional law firms in Denver	45
Constitutional law firms in Dallas	42

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “constitutional law firms”, with match quality audited by blind human judging, and headquartered in the United States.
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: Contact records re-verify on a rolling cadence; 127 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

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

There are 3,325 constitutional law firms headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Gordon Rees Scully Mansukhani, LLP, headquartered in San Francisco, tops this list with the largest team on record.

Which city has the most constitutional law firms?

New York leads with 152 headquartered companies, followed by Washington (94) and Los Angeles (72).

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 27,172 verified decision-maker contacts tracked across these 3,325 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.