Joseph Kerr (1765 - August 22, 1837) was a Democratic-Republican politician from Ohio. He served in the U.S. Senate.

Born in Kerrtown, Pennsylvania (now Chambersburg), Kerr moved to Ohio in 1792. He served in a number of positions as clerk, judge and justice of the peace in the Northwest Territory. After statehood was declared, he was elected to the Ohio House of Representatives in 1808, 1816, 1818, and 1819 and the Ohio State Senate in 1804 and 1810. He also served as a Brigadier General during the War of 1812, in charge of supplying provisions to the Army of the Northwest. Kerr was elected to the U.S. Senate in 1814 to fill a vacancy created by the resignation of Thomas Worthington. Kerr served from December 10, 1814, to March 3, 1815. He did not seek re-election. Kerr's extensive farm went bankrupt in 1826, and he moved to Memphis, Tennessee and then to rural Louisiana, where he purchased a homestead.