Richard T. Renshaw (1822 – March 22, 1879) was an officer in the United States Navy during the American Civil War. Renshaw entered the Navy as a midshipman on January 26, 1838, and was commissioned acting master September 10, 1851. Resigning June 29, 1852, Renshaw reentered the Navy at the beginning of the Civil War as a lieutenant on May 13, 1861. He served in the North Atlantic Blockading Squadron commanding side-wheel gunboat Louisiana during the war, winning promotion to commander on September 22, 1862.