David Riesman was an American sociologist, attorney, and educator.

After graduating from Harvard Law School, where he was a member of the Harvard Law Review, Riesman clerked for Supreme Court Justice Louis Brandeis from 1935-1936. He also taught at the University of Buffalo Law School.

Riesman's 1950 book, The Lonely Crowd, a sociological study of modern conformity, which postulates the existence of the "inner-directed" and "other-directed" personalities. Riesman argues that the character of post WWII American society impels individuals to "other-directedness", the preeminent example being modern suburbia, where individuals seek their neighbors approval and fear being outcast from their community. This lifestyle has a coercive effect, which compels people to abandon "inner-direction" of their lives, and induces them to take on the goals, ideology, likes, and dislikes of their community. Ironically, this creates a tightly grouped crowd of people that is yet incapable of truly fulfilling each other's desire for companionship. The book is considered a landmark study of American character. Riesman was a major public intellectual as well as a sociologist, representing an early example of what sociologists now call "public sociology."