List of advertising agencies

This is a list of notable advertising agencies and marketing groups. These agencies have a large revenue, won major national and international advertising awards or were among the earliest agencies created.

By 2005 worldwide revenue

Rank Agency Headquarters Revenue (US$ millions)
1 Omnicom Group New York City 10,481.1
2 WPP Group London 10,032.2
3 Interpublic Group of Companies New York City 6,700.0
4 Publicis Groupe Paris 5,107.2
5 Dentsu* Tokyo 2,887.8
6 Havas Suresnes, France 1,808.0
7 Aegis Group London 1,577.6
8 Hakuhodo DY Holdings* Tokyo 1,364.0
9 Asatsu-DK Tokyo 444.8
10 MDC Partners Toronto/New York City 443.5
11 Sapient Cambridge, Massachusetts 358.4
12 Digitas Boston 340.5
13 aQuantive Seattle 258.4
14 Aspen Marketing Services West Chicago, Illinois 229.0
15 Cheil Communications Seoul 210.7
16 Monster Worldwide New York City 168.6
17 WB Doner & Company Southfield, Michigan 164.3
18 Cossette Communication Group Quebec City 164.1
19 Richards Group Dallas 148.0
20 Bartle Bogle Hegarty* London 128.1
21 M&C Saatchi London 123.3
22 Chime Communications PLC London 114.2
23 Merkle Lanham, Maryland 108.0
24 Wieden+Kennedy* Portland, Oregon 102.9
25 RPA Santa Monica 102.2
26 Cramer-Krasselt Chicago 96.2
27 ChoicePoint Precision Marketing Alpharetta, Georgia 91.5

*estimate