Alfred Pleasonton (July 7, 1824 – February 17, 1897) was a United States Army officer and General of Union cavalry during the American Civil War. He commanded the Cavalry Corps of the Army of the Potomac during the Gettysburg Campaign, including the largest predominantly cavalry battle of the war, Brandy Station. In 1864 he was transferred to the Trans-Mississippi Theater, where he defeated Confederate General Sterling Price in two key battles, effectively ending the war in Missouri. He was the son of Stephen Pleasonton and younger brother of Augustus Pleasonton.