Tom Sayers (15 or 25 May 1826 – 8 November 1865) was an English bare-knuckle prize fighter. There were no formal weight divisions at the time, and although Sayers was only five feet eight inches tall and never weighed much more than 150 pounds, he frequently fought much bigger men. In a career which lasted from 1849 until 1860, he lost only one of sixteen bouts. He was recognized as heavyweight champion of England between 1857, when he defeated William Perry (the "Tipton Slasher") and his retirement in 1860.