Patrick Calhoun Caldwell (March 10, 1801 – November 22, 1855) was a U.S. Representative from South Carolina. Born near Newberry, South Carolina, Caldwell was graduated from South Carolina College (now the University of South Carolina) at Columbia in 1820.He studied law.He was admitted to the bar in 1822 and commenced practice in South Carolina.He served as member of the State house of representatives 1838-1839.