O'Hara, U.S. Treasury is an American television crime drama starring David Janssen and broadcast by CBS during the 1971-72 television season. Jack Webb's Mark VII Limited packaged the program for Universal Television. Webb and longtime colleague James E. Moser created the show; Leonard B. Kaufman was the producer. The series was produced with the full approval and cooperation of the United States Department of the Treasury.

O'Hara, U.S. Treasury ran for 1 season. No new episodes are scheduled.