James Knox Polk Laffoon (October 24, 1844 – October 22, 1906) was a U.S. Representative from Kentucky.Born near Madisonville, Kentucky, Laffoon attended the local schools. In September 1861, during the Civil War, he enlisted in the Confederate States Army in Company F, 8th Kentucky Infantry, at the age of 17. Elected a lieutenant, Lafoon was captured at the Battle of Fort Donelson on February 16, 1862, and was held a prisoner of war at Camp Morton, at Indianapolis, Indiana.