An American lawyer, historian, and novelist, he is known for literary works that explore the private lives of wealthy East Coast Americans. His best-known works include The House of Five Talents, East Side Story, and Portrait in Brownstone.
He briefly studied at Yale University and went on to earn a law degree from the University of Virginia.
He received an honorary degree from New York University.
He was the son of Priscilla Dixon and Joseph Howland Auchincloss.
Gore Vidal admired Auchincloss's work.