What is the Largest Advertising Agency in the World?

WPP is the world's biggest advertising company by revenue, employing around 190,000 people in 3,000 offices in 112 countries.

Universal McCann

is a creative media agency that has a client list that includes Johnson & Johnson, Coca-Cola, Fiat Chrysler Automobiles, The Hershey Company, CVS Health, ExxonMobil, BMW and Sony. The agency is part of the Interpublic network and is a member of the IPG Mediabrands group with Initiative, Magna, Mediabrands Audience Platform and three other agencies. UM operates in more than 100 countries and employs more than 4,800 people. South Korea's largest advertising agency, Cheil Worldwide, is more than three times larger in turnover than its closest domestic rival.

The agency has 53 offices in 43 countries with 6,200 employees worldwide. Owned by Samsung Group, Cheil's list of top customers includes Adidas, GE, Coca-Cola, Lego, Microsoft, Shell and more.

Leo Burnett

is one of the most recognized and well-known advertising agencies in the world for its long history of advertising excellence. The agency was known for creating iconic characters for brands such as Uncle Ben, Jolly Green Giant, Tony the Tiger, Pillsbury Dough-Boy and Marlboro Man. Today, Leo Burnett continues to be known as a leader in advertising with 85 offices, more than 8,000 employees and a member of Publicis.

Walter Thompson is the world's best-known marketing agency and has been creating creative solutions that make brands last for more than 150 years. JWT, a true global agency, has more than 200 offices in more than 90 countries and has nearly 10,000 employees. The WPP agency is the registration agency for Church's Chicken USMC, Subway and KPMG to name a few. Created in 1997, Mindshare is one of the best media buying and planning agencies in the world. The agency is part of WPP's GroupM and has 116 offices in 86 countries in North America, Latin America, Europe, the Middle East and Asia. Mindshare acts as a registered media agency for Pandora Jewelry TJX and Tyson Foods.

In 1949 Bill Bernbach Ned Doyle and Maxwell Dane founded the advertising giant DDB.DDB is one of the most recognized advertising agencies and regularly receives awards and accolades. While maintaining a lower profile than other major agencies DDB continues to work with major brands from Heineken to Ubisoft and Volkswagen while serving as the registration agency for McDonald's Jeep and more.


is Japan's largest advertising agency. The agency offers a wide range of services across eight business domains including marketing digital creative promotions media content public relations and global business. Dentsu was founded in 1901 and works with global brands such as Facebook. With the ability to provide everything from strategy to logistics as well as branding and cybersecurity more and more companies are choosing to work with the multifaceted agency.

Deloitte Digital is only scratching the surface of its capabilities and the agency continues to acquire talent recently acquiring San Francisco-based creative shop Heat and Swedish agency Acne. This list represents the 50 largest agencies and not the networks or groups of agencies such as WPP Publicis Group Dentsu Inc Interpublic and Omnicom Group. He has a reputation for cutting-edge creativity in his services and has long been a member of the “Big Five Advertising Agencies”.


, the youngest of the three global advertising networks within Omnicom has 11 300 employees in 305 offices in 98 countries and has served as a registration agency for Miller Lite Airbnb Accenture and GoDaddy. Looking to the Future Agencies Focus on Being More Productive Efficient and Profitable. With more than 90 years of success Ketchum is one of the largest and most geographically diverse public relations agencies in the world. Advertising agencies can work as “full-service agencies” for clients in a variety of disciplines or they can specialize in certain areas or niches. The agency is consistently at the top of the RECMA Global Qualitative Assessment Ranking and serves clients in 150 countries with more than 10 000 talented employees.

An advertising agency often known as a creative agency or advertising agency is a company dedicated to creating planning and managing advertising and sometimes other forms of promotion and marketing for its clients. With more than 10 000 team members worldwide the digital agency provides services in innovation strategy experience technology knowledge and brand. In fourth place on this list of the 10 largest advertising agencies in the world is The Interpublic Group of Companies a publicly traded American advertising company. While huge agency networks and holding companies are at the forefront there has been a convergence of consulting firms and technology giants entering the framework to compete as well as internal agencies.


, the fourth largest agency of WPP GroupM is a leading media agency with clients such as Vodafone Netflix Paramount Pictures Marriott Chanel GE and Xerox. The agency remains a global powerhouse with skills in the full range of marketing disciplines including healthcare public relations and CRM. This includes a common set of client objectives where agencies feel a shared sense of ownership of the strategic process.


also provides historical profiles of some of the most important advertising agencies of the past which have closed down or been absorbed by other agencies or networks.

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