William Bernbach, American advertiser, co-founded DDB Worldwide (died 1982)

William Bernbach was an American advertising creative director. He was one of the three founders in 1949 of the international advertising agency Doyle Dane Bernbach (DDB). He directed many of the firm's breakthrough ad campaigns and had a lasting impact on the creative team structures now commonly used by ad agencies.

DDB Worldwide Communications Group LLC, known internationally as DDB, is a worldwide marketing communications network. It is owned by Omnicom Group, one of the world's largest advertising holding companies. The international advertising networks Doyle Dane Bernbach and Needham Harper merged their worldwide agency operations to become DDB Needham in 1986. At that same time the owners of Doyle Dane Bernbach, Needham Harper and BBDO merged their shareholdings to form the US listed holding company Omnicom. In 1996, DDB Needham became known as DDB Worldwide.