Company lists · Data refreshed September 2026

Top 25 Government relations firms worldwide

Name: Government relations firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 3,324 companies tracked

RevenueBase identified 3,324 government relations firms worldwide as of September 2026 and tracks 29,441 professional contacts across them, including 13,089 with verified work emails. The United States is the largest market and Washington the largest hub.

This list covers government relations firms worldwide, 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 19, 2026. Country and city lists for government relations firms follow the table.

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 19, 2026 86% judged on-target in blind review

3,324Companies

29,441Contacts tracked

13,089Verified emails

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The 25 largest government relations firms worldwide

Ranked by team size

Top 25 of 3,324 government relations firms worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to government relations 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	Taft Stettinius & Hollister LLP	Indirect evidence	Cincinnati, OH, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,980 contacts →
	Indirect evidence “At Taft, we work as one team, driven and committed to helping you succeed.” Source: RevenueBase Database · checked Sep 19, 2026
2	Buchanan Ingersoll & Rooney PC	Strong evidence	Pittsburgh, PA, United StatesHQ checked Sep 19, 2026	501-1,000	1,197 contacts →
	Strong evidence “Buchanan Ingersoll & Rooney is a national law firm with a proven reputation for providing progressive, industry-leading legal, business, regulatory and government relations advice…” Source: RevenueBase Database · checked Sep 19, 2026
3	Bracewell LLP	Strong evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	501-1,000	933 contacts →
	Strong evidence “Bracewell LLP is a leading law and government relations firm.” Source: RevenueBase Database · checked Sep 19, 2026
4	DDC Public Affairs	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	411 contacts →
	Indirect evidence “DDC Public Affairs builds communities of advocates that impact policy and win campaigns.” Source: RevenueBase Database · checked Sep 19, 2026
5	Mercury Public Affairs, LLC	Strong evidence	New York, NY, United StatesHQ checked Sep 19, 2026	51-200	390 contacts →
	Strong evidence “Mercury is a national bipartisan government relations and strategic communications firm.” Source: RevenueBase Database · checked Sep 19, 2026
6	DKC	Strong evidence	New York, NY, United StatesHQ checked Sep 19, 2026	201-500	349 contacts →
	Strong evidence “DKC is a full service public relations, marketing and government affairs firm and part of the Acceleration Community of Companies, Based in New York City, and with offices in Los…” Source: RevenueBase Database · checked Sep 19, 2026
7	Cornerstone Government Affairs	Strong evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	201-500	255 contacts →
	Strong evidence “Cornerstone Government Affairs is a full-service, bipartisan, employee-owned firm specializing in government relations and lobbying, public affairs, strategic communications, and…” Source: RevenueBase Database · checked Sep 19, 2026
8	BGR Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	243 contacts →
	Indirect evidence “The Services You Need BGR Group offers an integrated suite of bipartisan lobbying, strategic communications and advocacy solutions that help meet challenges in a risky…” Source: RevenueBase Database · checked Sep 19, 2026
9	Keller And Heckman LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	230 contacts →
	Indirect evidence “Keller and Heckman, founded in 1962, has a broad practice in the areas of regulatory law, public policy, and litigation, serving both domestic and international clients.” Source: RevenueBase Database · checked Sep 19, 2026
10	SKDK	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	220 contacts →
	Partial evidence “SKDK provides strategic advice, public relations, crisis communications, advertising, direct mail, and research to national and international companies, advocacy organizations…” Source: RevenueBase Database · checked Sep 19, 2026
11	DCI	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	198 contacts →
	Partial evidence “DCI Group is an independent public affairs consulting firm that specializes in public relations, crisis management, grassroots engagement, and digital advocacy.” Source: RevenueBase Database · checked Sep 19, 2026
12	Plus Communications	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 19, 2026	201-500	188 contacts →
	Indirect evidence “Strategy + Execution = Results.” Source: RevenueBase Database · checked Sep 19, 2026
13	Lilly & Company	Indirect evidence	Austin, TX, United StatesHQ checked Sep 19, 2026	n/a	187 contacts →
	Indirect evidence “Since its inception, Lilly & Company has built a unique and comprehensive strategy for providing the best possible services available in political fundraising and grassroots…” Source: RevenueBase Database · checked Sep 19, 2026
14	Global Strategy Group	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	51-200	179 contacts →
	Indirect evidence “Global Strategy Group is the go-to public affairs, communications, and research partner for companies, causes, and campaigns.” Source: RevenueBase Database · checked Sep 19, 2026
15	Mcallister & Quinn	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	170 contacts →
	Partial evidence “McAllister & Quinn is a Washington, DC consulting firm that provides a comprehensive range of services to a diverse group of clients with issues before the federal government.” Source: RevenueBase Database · checked Sep 19, 2026
16	Invariant	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	166 contacts →
	Indirect evidence “Invariant is a bipartisan business advisory firm, providing strategic advice to companies, trade associations, non-profits, and individuals on how to make Washington work for them.” Source: RevenueBase Database · checked Sep 19, 2026
17	Mcdonald Carano	Partial evidence	Reno, NV, United StatesHQ checked Sep 19, 2026	51-200	165 contacts →
	Partial evidence “McDonald Carano was founded in Reno in 1949 and has grown to 60 attorneys and government affairs professionals serving state, national, and international clients from offices in…” Source: RevenueBase Database · checked Sep 19, 2026
18	Strategycorp	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 19, 2026	51-200	130 contacts →
	Indirect evidence “Being right isn't enough.” Source: RevenueBase Database · checked Sep 19, 2026
19	Mcguirewoods Consulting	Partial evidence	Richmond, VA, United StatesHQ checked Sep 19, 2026	51-200	127 contacts →
	Partial evidence “What people say and do in government can have a profound impact on your organization.” Source: RevenueBase Database · checked Sep 19, 2026
20	Public & Government Affairs At Edelman	Partial evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	201-500	121 contacts →
	Partial evidence “Edelman’s public and government affairs team of consultants are trusted and experienced public affairs advisors-including former government officials, political advisors, policy…” Source: RevenueBase Database · checked Sep 19, 2026
21	Cattaneo Zanetto & CO	Indirect evidence	ItalyHQ checked Sep 19, 2026	51-200	104 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
22	Multistate	Strong evidence	Arlington, VA, United StatesHQ checked Sep 19, 2026	51-200	104 contacts →
	Strong evidence “MultiState is a full-service state and local government relations company.” Source: RevenueBase Database · checked Sep 19, 2026
23	Stateside Associates	Partial evidence	Arlington, VA, United StatesHQ checked Sep 19, 2026	51-200	102 contacts →
	Partial evidence “Stateside Associates is the largest state and local government affairs firm.” Source: RevenueBase Database · checked Sep 19, 2026
24	Powers LAW	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	101 contacts →
	Indirect evidence “Powers Pyles Sutter & Verville PC is a Washington, DC-based law firm that began with a strong focus on healthcare law and healthcare policy and has gradually expanded capabilities…” Source: RevenueBase Database · checked Sep 19, 2026
25	Monument Advocacy	Strong evidence	Washington, DC, United StatesHQ checked Sep 19, 2026	51-200	97 contacts →
	Strong evidence “Monument Advocacy is a bipartisan firm that offers government relations, public affairs, strategic and crisis communications, and digital services.” Source: RevenueBase Database · checked Sep 19, 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: government relations 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 government relations firms.
Partial evidence: Its own public description names part of government relations firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name government relations 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 3,324 government relations firms worldwide

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Government relations firms worldwide at a glance

As of Sep 19, 2026

44.5%Verified-email coverage

8.9Average contacts per company

1-10Median size (employees)

14.5%Largest-city concentration · Washington

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

2,572

11-50

616

51-200

105

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 government relations 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.
Coverage: Every country. Country and city lists for government relations firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “government relations 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 government relations 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 government relations firms, and records with no verified work email.
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, 13,089 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 19, 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.

Government relations firms by location

24 lists · largest first

Every Government relations firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 government relations 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 government relations firms are there worldwide?

RevenueBase identified 3,324 government relations firms worldwide 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?

Taft Stettinius & Hollister LLP, headquartered in Cincinnati, tops this list with the largest team on record.

Which country has the most government relations firms?

The United States leads with 2,120 companies, followed by Canada (120) and Brazil (64). Every government relations firms list by country and city is linked on this page.

Which city has the most government relations firms?

Washington leads with 483 headquartered companies, followed by Sacramento (97) and Austin (76).

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 13,089 verified decision-maker contacts tracked across these 3,324 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 19, 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.