WPP Group plc, based in London, is one of the world's largest advertising agency networks. In addition to advertising, its portfolio includes companies in public relations, lobbying, branding & identity, and specialty communications.

WPP Group's advertising agency holdings include Ogilvy & Mather Worldwide, Young & Rubicam, and J. Walter Thompson Company. Its public relations company holdings include Hill and Knowlton, Ogilvy Public Relations Worldwide, Burson-Marsteller, and Cohn & Wolfe. Its media planning/buying company holdings include Mediaedge:cia, Mindshare, MediaInsight and Maximize.

The company's name derives from "Wire & Plastic Products", a former manufacturer of wire baskets.

WPP Group trades on the London Stock Exchange (symbol: WPP) and the Nasdaq (symbol: WPPGY).