Company lists · Data refreshed August 2026

Top 25 Advertising agencies based in the United States

Name: Advertising agencies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Aug 30, 2026 24,674 companies tracked

There are 24,674 advertising agencies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 334,200 professional contacts across them, including 94,735 with verified work emails and 112,988 with mobile numbers. New York is the largest hub.

This list covers advertising agencies 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, how directly it supports the match, and when it was last checked. Data refreshed August 30, 2026.

24,674Companies

334,200Contacts tracked

94,735Verified emails

112,988Mobile numbers

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The 25 largest advertising agencies based in the United States

Ranked by team size

Top 25 of 24,674 advertising agencies based in the United States, ranked by team size, largest first. Data refreshed Aug 30, 2026. Evidence rates how directly each company's own description names advertising agencies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts	Verified emails
1	QUADIndirect evidence “Quad (NYSE: QUAD) is a global marketing experience company that helps brands make direct consumer connections, from household to in-store to online.” Source: company website · checked Aug 30, 2026	Sussex, WI, United States	10001+	9,571	1,478
2	Deloitte DigitalIndirect evidence “At Deloitte Digital, we connect brands with the right strategies and tools to create great impact.” Source: company website · checked Aug 30, 2026	Denver, CO, United States	10001+	7,701	2,261
3	Omnicom Media GroupIndirect evidence “Omnicom Media Group (OMG), the media services division of Omnicom Group Inc, delivers transformational experiences for consumers, clients, and talent.” Source: company website · checked Aug 30, 2026	New York, United States	10001+	4,016	1,180
4	Mccann WorldgroupIndirect evidence “McCann Worldgroup, part of the Interpublic Group (NYSE: IPG), is the irrefutable leader in the business of creativity.” Source: company website · checked Aug 30, 2026	New York, NY, United States	10001+	3,879	562
5	Spark FoundryIndirect evidence “As one of the fastest-growing global media agency networks, Spark Foundry is not beholden to legacy.” Source: company website · checked Aug 30, 2026	Chicago, IL, United States	1,001-5,000	2,882	1,440
6	Digitas North AmericaIndirect evidence “Digitas is the Networked Experience Agency, built on the vision that we create magnetic experiences that earn the right for brands to exist in human networks.” Source: company website · checked Aug 30, 2026	Boston, MA, United States	1,001-5,000	2,692	966
7	PublicisIndirect evidence “You can either adapt to change, ignore it or lead it.” Source: company website · checked Aug 30, 2026	San Francisco, CA, United States	1,001-5,000	2,551	106
8	Horizon MediaIndirect evidence “Horizon Media is a leader in driving business-based outcomes for marketers.” Source: company website · checked Aug 30, 2026	Los Angeles, CA, United States	1,001-5,000	2,354	1,588
9	UM WorldwideIndirect evidence “Our Full Color Media approach creates limitless possibilities, making everything we do intelligently driven, diversely courageous, business- and brand-obsessed, and dedicated to…” Source: company website · checked Aug 30, 2026	New York, NY, United States	1,001-5,000	2,009	744
10	OmnicomIndirect evidence “Omnicom is the world’s leading marketing and sales company, built for intelligent growth in the next era.” Source: company website · checked Aug 30, 2026	New York, NY, United States	10001+	1,702	274
11	Young & RubicamIndirect evidence “Y&R is a leading global marketing communications company, with more than 189 offices in 90+ countries.” Source: company website · checked Aug 30, 2026	New York, NY, United States	10001+	1,595	21
12	VaynermediaIndirect evidence “VaynerMedia is a contemporary global creative and media agency with an expertise in driving relevance for clients and delivering impactful business results.” Source: company website · checked Aug 30, 2026	New York, NY, United States	1,001-5,000	1,420	395
13	Tbwa WorldwideIndirect evidence “TBWA is The Disruption Company®.” Source: company website · checked Aug 30, 2026	New York, NY, United States	10001+	1,249	73
14	CMI Media GroupIndirect evidence “CMI Media Group, a WPP company, is a full-service media agency focused solely on health, wellness, and pharmaceutical marketing.” Source: company website · checked Aug 30, 2026	Costa Mesa, CA, United States	1,001-5,000	1,229	933
15	MccannIndirect evidence “We build enduring brands that move people and markets through the radical creativity of Truth Well Told™.” Source: company website · checked Aug 30, 2026	New York, NY, United States	10001+	1,197	271
16	TinuitiIndirect evidence “Tinuiti is a media agency that not only builds brands, but architects business outcomes.” Source: company website · checked Aug 30, 2026	Philadelphia, PA, United States	1,001-5,000	1,181	683
17	Hakuhodo INCIndirect evidence “Founded in 1895, Hakuhodo Inc.” Source: company website · checked Aug 30, 2026	New York, NY, United States	1,001-5,000	1,149	280
18	BrainlabsIndirect evidence “Brainlabs is an independent, AI-native media agency built to grow client revenue and prove the impact of every dollar spent on media.” Source: company website · checked Aug 30, 2026	New York, NY, United States	1,001-5,000	1,033	486
19	XR Extreme ReachStrong evidence “XR Extreme Reach is the leading platform for managing advertising operations.” Source: company website · checked Aug 30, 2026	Burbank, CA, United States	1,001-5,000	964	443
20	Finn PartnersIndirect evidence “1300+ People.” Source: company website · checked Aug 30, 2026	Denver, CO, United States	1,001-5,000	897	683
21	EssenceIndirect evidence “Formerly Essence, we are now EssenceMediacom.” Source: company website · checked Aug 30, 2026	Minneapolis, MN, United States	1,001-5,000	788	139
22	Mediahub WorldwideIndirect evidence “Mediahub is an award-winning global media agency and part of Omnicom Media.” Source: company website · checked Aug 30, 2026	Miami, FL, United States	1,001-5,000	707	393
23	Katz Media GroupIndirect evidence “As the nation's largest media representation firm, Katz Media Group delivers local relevance at scale.” Source: company website · checked Aug 30, 2026	New York, NY, United States	1,001-5,000	567	233
24	BCW GlobalIndirect evidence “BCW is the global communications agency built to move people.” Source: company website · checked Aug 30, 2026	New York, NY, United States	1,001-5,000	450	133
25	MDC PartnersIndirect evidence “Stagwell (NASDAQ: STGW) is the challenger holding company built to transform marketing.” Source: company website · checked Aug 30, 2026	New York, United States	10001+	441	4

Showing 25 of 24,674 advertising agencies based in the United States

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Advertising agencies based in the United States at a glance

As of Aug 30, 2026

1-10Median size (employees)

New YorkLargest hub · 1747 HQs

112,988Contacts with mobile numbers

Aug 30, 2026Data refreshed

Companies by employee count

1-10

17,234

11-50

6,086

51-200

1,003

201-500

186

501-1,000

1,001-5,000

10001+

Advertising agencies by metro

Metro	Companies
Advertising agencies in New York	1747
Advertising agencies in Los Angeles	1195
Advertising agencies in Chicago	550
Advertising agencies in Miami	542
Advertising agencies in Atlanta	500
Advertising agencies in Dallas	383
Advertising agencies in Houston	345

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 advertising agencies, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “advertising agencies”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among advertising agencies, 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 an evidence rating so you can judge each match yourself.
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, 94,735 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 30, 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.

Frequently asked

How many advertising agencies are there based in the United States?

There are 24,674 advertising agencies headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

QUAD, headquartered in Sussex, tops this list with the largest team on record.

Which city has the most advertising agencies?

New York leads with 1747 headquartered companies, followed by Los Angeles (1195) and Chicago (550).

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 94,735 verified decision-maker contacts tracked across these 24,674 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 30, 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.