Otho Robards Singleton was a U.S. Representative from Mississippi and a member of the Confederate States Congress during the American Civil War.

The 1st Confederate States Congress, consisting of the Confederate States Senate and the Confederate States House of Representatives, convened between February 18, 1862, and February 17, 1864. This assembly took place during the first two years of Jefferson Davis's presidency, convening at the Virginia State Capitol in Richmond, Virginia.