Company lists · Data refreshed 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 Data refreshed Aug 31, 2026 3,325 companies tracked

RevenueBase identified 3,325 constitutional law firms headquartered in the United States as of August 2026 and 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. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed August 31, 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 RevenueBase Smart Search rating on every row Refreshed Aug 31, 2026 86% judged on-target in blind review

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 refreshed Aug 31, 2026. RevenueBase Smart Search rates how each company's information relates to constitutional 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	Gordon Rees Scully Mansukhani, LLP	Partial evidence	San Francisco, CA, United States	1,001-5,000	2,807 contacts →
	Partial evidence “As the only full-service law firm with offices and attorneys in all 50 states, Gordon Rees Scully Mansukhani delivers maximum value to our clients by combining the resources of a…” Source: RevenueBase Database · checked Aug 31, 2026
2	Nelson Mullins Riley & Scarborough	Partial evidence	Columbia, SC, United States	1,001-5,000	2,036 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 Aug 31, 2026
3	Venable LLP	Partial evidence	Washington, DC, United States	1,001-5,000	1,791 contacts →
	Partial evidence “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: RevenueBase Database · checked Aug 31, 2026
4	ACLU	Indirect evidence	NY, United States	501-1,000	1,077 contacts →
	Indirect evidence “The ACLU is an non-profit, non-partisan organization of people who believe in the power of action.” Source: RevenueBase Database · checked Aug 31, 2026
5	Quintairos, Prieto, Wood & Boyer, P.A	Partial evidence	Jacksonville, FL, United States	1,001-5,000	1,060 contacts →
	Partial evidence “Over the past 25 years, QPWB is one of the fastest-growing law firms in the US.” Source: RevenueBase Database · checked Aug 31, 2026
6	Kelley Drye & Warren LLP	Partial evidence	Los Angeles, CA, United States	501-1,000	686 contacts →
	Partial evidence “Kelley Drye is an AmLaw 200 law firm of more than 350 lawyers and other professionals practicing in New York, NY; Washington, D.C; Chicago, IL; Houston, TX, Los Angeles, CA; San…” Source: RevenueBase Database · checked Aug 31, 2026
7	Grayrobinson, P.A	Indirect evidence	Miami, FL, United States	501-1,000	673 contacts →
	Indirect evidence “GrayRobinson is a multidimensional team of attorneys, advisors, and consultants recognized as one of the most influential firms in Florida.” Source: RevenueBase Database · checked Aug 31, 2026
8	Honigman LLP	Partial evidence	Kalamazoo, MI, United States	501-1,000	666 contacts →
	Partial evidence “Honigman LLP is an Am Law 200 full-service, general business law firm with more than 400 attorneys counseling clients on complex issues across the country in Chicago, Michigan…” Source: RevenueBase Database · checked Aug 31, 2026
9	Wiley Rein LLP	Indirect evidence	Washington, DC, United States	501-1,000	576 contacts →
	Indirect evidence “Founded in 1983, Wiley is a dominant presence in the nation’s capital.” Source: RevenueBase Database · checked Aug 31, 2026
10	Munger, Tolles & Olson LLP	Indirect evidence	San Francisco, CA, United States	201-500	528 contacts →
	Indirect evidence “Munger, Tolles & Olson is a 200-lawyer firm based in Los Angeles with a national practice representing clients in a broad range of complex and high-profile matters.” Source: RevenueBase Database · checked Aug 31, 2026
11	Gunster	Partial evidence	Miami, FL, United States	501-1,000	522 contacts →
	Partial evidence “Gunster, Florida’s law firm for leaders, provides full-service legal counsel to leading organizations and individuals from its 13 offices statewide.” Source: RevenueBase Database · checked Aug 31, 2026
12	The United Firm LA Liga Defensora, APC	Indirect evidence	Austin, TX, United States	1,001-5,000	511 contacts →
	Indirect evidence “The United Firm \| La Liga Defensora, A.P.C.” Source: RevenueBase Database · checked Aug 31, 2026
13	Kelley Kronenberg	Partial evidence	Daytona Beach, FL, United States	501-1,000	476 contacts →
	Partial evidence “Founded in 1980, Kelley Kronenberg is an award-winning, multi-practice national law firm with over 520 employees, more than 240 attorneys, and 19 locations throughout Florida and…” Source: RevenueBase Database · checked Aug 31, 2026
14	Dickie, Mccamey & Chilcote	Indirect evidence	Charlotte, NC, United States	201-500	406 contacts →
	Indirect evidence “21 Offices \| 11 States \| 1 Firm Dickie, McCamey & Chilcote, P.C.” Source: RevenueBase Database · checked Aug 31, 2026
15	Resnick & Louis, P.C.	Indirect evidence	Irvine, CA, United States	501-1,000	338 contacts →
	Indirect evidence “Resnick & Louis, P.C.” Source: RevenueBase Database · checked Aug 31, 2026
16	Nossaman LLP	Partial evidence	Tucson, AZ, United States	201-500	332 contacts →
	Partial evidence “Nossaman LLP is a national law firm with attorneys and policy advisors located in 12 offices throughout the United States.” Source: RevenueBase Database · checked Aug 31, 2026
17	Richards, Layton & Finger	Partial evidence	Wilmington, DE, United States	201-500	317 contacts →
	Partial evidence “For over 125 years, Richards, Layton & Finger has been the go-to Delaware law firm for clients seeking top-notch counsel and representation.” Source: RevenueBase Database · checked Aug 31, 2026
18	Mcnees Wallace & Nurick	Partial evidence	Lancaster, PA, United States	201-500	315 contacts →
	Partial evidence “Since 1935, McNees Wallace & Nurick has been a trusted, client-focused law firm delivering practical, results-driven legal solutions to businesses, individuals, and organizations.” Source: RevenueBase Database · checked Aug 31, 2026
19	Schiff Hardin LLP	Indirect evidence	Chicago, IL, United States	501-1,000	297 contacts →
	Indirect evidence “Schiff Hardin LLP is now ArentFox Schiff.” Source: RevenueBase Database · checked Aug 31, 2026
20	Maynard Nexsen	Indirect evidence	Los Angeles, CA, United States	501-1,000	294 contacts →
	Indirect evidence Source: RevenueBase Database · checked Aug 31, 2026
21	Manning Kass	Partial evidence	San Francisco, CA, United States	201-500	287 contacts →
	Partial evidence “Founded in 1994 with just 16 attorneys and two practice areas, Manning Kass is today a top-tier full-service national law firm with more than 170 Attorneys, 8 offices, and 35…” Source: RevenueBase Database · checked Aug 31, 2026
22	Messerli Kramer, P.A	Partial evidence	Minneapolis, MN, United States	201-500	286 contacts →
	Partial evidence “WHO WE ARE At Messerli Kramer, we’ve spent 60 years building a reputation as a firm of “attorneys and advisors” – or, as we like to say, a place where the law isn’t always the…” Source: RevenueBase Database · checked Aug 31, 2026
23	Margolis Edelstein	Indirect evidence	Wilimington, United States	201-500	279 contacts →
	Indirect evidence “Margolis Edelstein was founded in Philadelphia over 65 years ago.” Source: RevenueBase Database · checked Aug 31, 2026
24	Weinberg Wheeler Hudgins Gunn & Dial	Indirect evidence	Birmingham, AL, United States	201-500	263 contacts →
	Indirect evidence “Fueled by the steadfast commitment of our loyal clients, WWHGD lawyers have dedicated themselves to a vision of creating a powerhouse national trial firm.” Source: RevenueBase Database · checked Aug 31, 2026
25	Swanson, Martin & Bell, LLP	Indirect evidence	Edwardsville, IL, United States	201-500	259 contacts →
	Indirect evidence “Swanson, Martin & Bell, LLP was founded in 1992 by a group of trial lawyers who left a large Chicago firm to better serve the needs of their clients.” Source: RevenueBase Database · checked Aug 31, 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: constitutional 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 constitutional law firms.
Partial evidence: Its own public description names part of constitutional law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name constitutional 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 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 31, 2026

51.6%Verified-email coverage

52.3%Mobile-number coverage

15.8Average contacts per company

1-10Median size (employees)

4.6%Largest-city concentration · New York

Aug 31, 2026Page data refreshed

Companies by employee count

1-10

2,117

11-50

941

51-200

200

201-500

501-1,000

1,001-5,000

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 constitutional 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 “constitutional 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 constitutional 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 constitutional 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, 27,172 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 August 31, 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.

Constitutional 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 constitutional 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 constitutional law firms are there based in the United States?

RevenueBase identified 3,325 constitutional law firms headquartered in the United States as of August 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?

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 refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 31, 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 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.