- Olympic Games - Beijing 2008 - Bronze - 4x400m
- World Championships - 4x400m: Berlin 2009 - Silver, Beijing 2015 - Bronze, London 2017 - Bronze
- European Championships - Zürich 2014 - Gold (400m & 4x400m), Amsterdam 2016 - Gold (400m), Barcelona 2010 - Silver (4×400m) Bronze (400m), Berlin 2018 - Silver (4×400m)
Nationality: Great Britain
Martyn Joseph Rooney (born 3 April 1987) is an English sprinter who specialises in the 400 metres event. He reached the 400 m final at the 2008 Summer Olympics and won bronze in the 4×400 metres relay. A mainstay on the anchor leg of the Great Britain 4 x 400 metre relay team, at the 2009 World Championships in Athletics he won a silver medal with the Great Britain relay team, and bronze in the 2015 World Championships. His personal best time is 44.45 seconds.