Damian David George Warner (born November 4, 1989) is a Canadian track and field athlete specializing in decathlon. He is the 2020 Olympic champion and a three-time World medalist (silver in 2015, bronze in 2013 and 2019). Warner also won the bronze medal at the 2016 Summer Olympics and was the 2014 Commonwealth champion and the two-time and reigning Pan American champion from the 2015 and 2019 Games. Warner holds the title to the Pan Am Games record and the Canadian record for the decathlon, and the fourth-highest decathlon score in history.
Notable for his sprinting, Warner holds decathlon bests in the 100 m and 110 m hurdles, running a 10.12 and 13.27 respectively, as well as in the long jump (8.28 m).