Company lists · Data refreshed September 2026

Top 25 Labor law firms based in Washington, United States

Name: Labor law firms based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 173 companies tracked

RevenueBase identified 173 labor law firms headquartered in Washington, United States as of September 2026 and tracks 8,499 professional contacts across them, including 5,184 with verified work emails. Across the United States, New York is the largest hub for this category (588 companies); Washington has 173.

This list covers labor law firms headquartered in Washington, 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

173Companies

8,499Contacts tracked

5,184Verified emails

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The 25 largest labor law firms based in Washington, United States

Ranked by team size

Top 25 of 173 labor law firms based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to labor 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	Arnold & Porter	Indirect evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	1,001-5,000	2,333 contacts →
	Indirect evidence “Arnold & Porter combines sophisticated regulatory, litigation, and transactional capabilities to resolve clients’ most complex issues.” Source: RevenueBase Database · checked Sep 14, 2026
2	Venable LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	1,001-5,000	1,790 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 Sep 14, 2026
3	Steptoe LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	1,001-5,000	1,207 contacts →
	Indirect evidence “In more than 100 years of practice, Steptoe* has earned an international reputation for vigorous representation of clients before governmental agencies, successful advocacy in…” Source: RevenueBase Database · checked Sep 14, 2026
4	Wiley Rein LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	501-1,000	576 contacts →
	Indirect evidence “Founded in 1983, Wiley is a dominant presence in the nation’s capital.” Source: RevenueBase Database · checked Sep 14, 2026
5	Mckenna Long & Aldridge LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	1,001-5,000	313 contacts →
	Indirect evidence “Dentons is proud to announce that the merger between Dentons US and McKenna Long & Aldridge is complete.” Source: RevenueBase Database · checked Sep 14, 2026
6	Dickstein Shapiro LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	501-1,000	292 contacts →
	Indirect evidence “Dickstein Shapiro LLP, Market Leading Specialty Firm (SM), is internationally recognized for its work with clients, from start-ups to Fortune 500 corporations.” Source: RevenueBase Database · checked Sep 14, 2026
7	Kellogg, Hansen, Todd, Figel & Frederick Pllc	Indirect evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	51-200	211 contacts →
	Indirect evidence “Kellogg Hansen works in complex trial and appellate litigation.” Source: RevenueBase Database · checked Sep 14, 2026
8	Groom LAW Group, Chartered	Partial evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	51-200	174 contacts →
	Partial evidence “Groom Law Group, Chartered is widely recognized as the leading benefits law firm in the United States with over 90 attorneys dedicated solely to the practice of employee benefits…” Source: RevenueBase Database · checked Sep 14, 2026
9	Jackson & Campbell, P.C	Partial evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	51-200	129 contacts →
	Partial evidence “For more than 130 years, Jackson & Campbell has been the law firm to which local, regional, and national businesses, associations, and Washingtonians turn for skilled and…” Source: RevenueBase Database · checked Sep 14, 2026
10	HWG LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	51-200	70 contacts →
	Partial evidence “HWG LLP is a boutique law firm designed to offer clients access to top tier legal talent without unnecessary overhead.” Source: RevenueBase Database · checked Sep 14, 2026
11	Relman Colfax Pllc	Partial evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	11-50	56 contacts →
	Partial evidence “Relman Colfax PLLC is a national civil rights law firm, with a litigation practice focused on combating discrimination and obtaining equity, including in the areas of housing…” Source: RevenueBase Database · checked Sep 14, 2026
12	The Employment LAW Group, P.C	Partial evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	51-200	55 contacts →
	Partial evidence “The Employment Law Group® law firm is a litigation boutique concentrating on the representation of employees and whistleblowers.” Source: RevenueBase Database · checked Sep 14, 2026
13	Maggio Kattar Nahajzer Alexander PC	Partial evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	11-50	55 contacts →
	Partial evidence “Maggio Kattar has been recognized as one of the top Immigration Law firms in the U.S.” Source: RevenueBase Database · checked Sep 14, 2026
14	Bredhoff & Kaiser Pllc	Partial evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	11-50	49 contacts →
	Partial evidence “Bredhoff & Kaiser PLLC is one of the nation’s preeminent law firms devoted to empowering workers and the institutions that advocate for them.” Source: RevenueBase Database · checked Sep 14, 2026
15	Conn Maciel Carey LLP	Strong evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	11-50	46 contacts →
	Strong evidence “Conn Maciel Carey LLP is a boutique law firm focused on Labor & Employment, Workplace Safety - OSHA/MSHA, and Litigation.” Source: RevenueBase Database · checked Sep 14, 2026
16	Katz Banks Kumin LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	11-50	42 contacts →
	Partial evidence “The lawyers of Katz Banks Kumin are nationally recognized leaders in the areas of whistleblower law, discrimination and sexual harassment law, wage and hour law, employment law…” Source: RevenueBase Database · checked Sep 14, 2026
17	Peacock Keller, LLP	Partial evidence	Washington, PA, United StatesHQ checked Sep 14, 2026	51-200	38 contacts →
	Partial evidence “Peacock Keller is a full service law firm headquartered in Washington, Pennsylvania.” Source: RevenueBase Database · checked Sep 14, 2026
18	Tiber Hudson LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	11-50	36 contacts →
	Partial evidence “Tiber Hudson LLC is a boutique law firm focused in providing legal services including complex commercial litigation, complex commercial transactions, corporate structure and…” Source: RevenueBase Database · checked Sep 14, 2026
19	O'donoghue & O'donoghue LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	11-50	35 contacts →
	Partial evidence “O'Donoghue & O'Donoghue LLP is one of the largest and oldest union-side law firms in the United States, with offices in Washington, D.C, Philadelphia, Pennsylvania, and Annapolis…” Source: RevenueBase Database · checked Sep 14, 2026
20	Carr Maloney PC	Partial evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	11-50	33 contacts →
	Partial evidence “Carr Maloney PC is a business and litigation law firm with a diverse client base including national, regional and local businesses.” Source: RevenueBase Database · checked Sep 14, 2026
21	Federal Practice Group, LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	11-50	33 contacts →
	Partial evidence “Federal Practice Group is a nationally recognized law firm specializing in federal employment, military law, government contracts, security clearance, litigation, and more.” Source: RevenueBase Database · checked Sep 14, 2026
22	Weiner Brodsky Kider PC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	51-200	31 contacts →
	Indirect evidence “Weiner Brodsky Kider PC is a Washington, D.C-based firm with a national practice focused on compliance, regulatory, transactional and litigation matters related to financial…” Source: RevenueBase Database · checked Sep 14, 2026
23	Duncan, Weinberg, Genzer & Pembroke, P.C. Dwgp	Indirect evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	11-50	28 contacts →
	Indirect evidence “Since its founding in 1971, DWG & P, has provided a broad range of counseling, regulatory, litigation and legislative services to clients in every region of the country.” Source: RevenueBase Database · checked Sep 14, 2026
24	Slevin & Hart P.C	Indirect evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	51-200	26 contacts →
	Indirect evidence “Slevin & Hart, P.C.” Source: RevenueBase Database · checked Sep 14, 2026
25	Cuneo, Gilbert & Laduca, LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 14, 2026	11-50	26 contacts →
	Indirect evidence “We practice advocacy-and only advocacy.” 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: labor 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 labor law firms.
Partial evidence: Its own public description names part of labor law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name labor 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 173 labor law firms based in Washington, United States

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Labor law firms based in Washington, United States at a glance

As of Sep 14, 2026

61.0%Verified-email coverage

49.1Average contacts per company

1-10Median size (employees)

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

119

11-50

51-200

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Washington, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 173 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 labor 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 Washington, United States whose own description of what they do matches “labor 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 labor 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 labor law firms, and records with no verified work email. Companies headquartered outside Washington 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, 5,184 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.

Labor law firms by metro in the United States

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 labor 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 labor law firms are there based in Washington, United States?

RevenueBase identified 173 labor law firms headquartered in Washington, 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?

Arnold & Porter, headquartered in Washington, tops this list with the largest team on record.

Which city in the United States has the most labor law firms?

New York leads the United States with 588 headquartered companies, followed by Los Angeles (437) and Chicago (318). Washington has 173.

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 5,184 verified decision-maker contacts tracked across these 173 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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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.