Company lists · Data verified August 2026

Top 25 Environmental law firms based in the United States

Name: Environmental 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 4,078 companies tracked

There are 4,078 environmental law firms headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 136,371 professional contacts across them, including 75,547 with verified work emails and 73,456 with mobile numbers. Washington is the largest hub.

This list covers environmental 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.

4,078Companies

136,371Contacts tracked

75,547Verified emails

73,456Mobile numbers

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The 25 largest environmental law firms based in the United States

Ranked by team size

Top 25 of 4,078 environmental 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	K&l Gates	Miami, FL	1,001-5,000	4,851	2,253
2	Cooley LLP	Palo Alto, CA	1,001-5,000	3,314	2,181
3	Foley & Lardner LLP	Boston, MA	1,001-5,000	2,894	1,589
4	Morrison Foerster	Washington, DC	1,001-5,000	2,660	1,590
5	Arnold & Porter	Washington, DC	1,001-5,000	2,324	1,648
6	Seyfarth Shaw LLP	Charlotte, NC	1,001-5,000	2,176	1,292
7	Dechert LLP	Philadelphia, PA	1,001-5,000	2,056	1,116
8	Nelson Mullins Riley & Scarborough	Columbia, SC	1,001-5,000	2,036	1,215
9	Taft Stettinius & Hollister LLP	Indianapolis, IN	1,001-5,000	1,963	1,418
10	Venable LLP	Washington, DC	1,001-5,000	1,791	1,184
11	Ballard Spahr LLP	Washington D.C., DC	1,001-5,000	1,720	1,097
12	Crowell & Moring	Chicago, IL	1,001-5,000	1,626	1,053
13	Quarles & Brady LLP	Milwaukee, WI	1,001-5,000	1,333	795
14	Buchanan Ingersoll & Rooney PC	Pittsburgh, PA	501-1,000	1,204	622
15	Jenner & Block	Chicago, IL	501-1,000	1,179	823
16	Stinson LLP	Denver, CO	501-1,000	1,170	638
17	Jackson Walker LLP	San Antonio, TX	501-1,000	1,006	537
18	Bracewell LLP	Austin, TX	501-1,000	943	442
19	Saul Ewing LLP	Philadelphia, PA	501-1,000	918	260
20	Brownstein Hyatt Farber Schreck	Las Vegas, NV	501-1,000	896	617
21	Stoel Rives LLP	Boise, ID	501-1,000	871	449
22	Benesch LAW	New York, NY	501-1,000	853	614
23	Fredrikson & Byron, P.A	Mankato, MN	501-1,000	852	586
24	Hall Booth Smith, P.C	Missoula, MT	501-1,000	802	609
25	Carlton Fields	Hartford, CT	501-1,000	801	443

Showing 25 of 4,078 environmental law firms based in the United States

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Environmental law firms based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

WashingtonLargest hub · 133 HQs

73,456Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

2,190

11-50

1,329

51-200

398

201-500

501-1,000

1,001-5,000

5,001-10,000

Environmental law firms by metro

Metro	Companies
Environmental law firms in Washington	133
Environmental law firms in New York	127
Environmental law firms in Houston	112
Environmental law firms in Chicago	77
Environmental law firms in Los Angeles	71
Environmental law firms in Austin	62
Environmental law firms in San Francisco	58
Environmental law firms in Dallas	58

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 “environmental 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; 0 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 environmental law firms are there based in the United States?

There are 4,078 environmental law firms headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

K&l Gates, headquartered in Miami, tops this list with the largest team on record.

Which city has the most environmental law firms?

Washington leads with 133 headquartered companies, followed by New York (127) and Houston (112).

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 75,547 verified decision-maker contacts tracked across these 4,078 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.