Martin Irungu Mathathi (born 25 December 1985 in Nyahururu) is a Kenyan long-distance runner, who competes in track, cross country and road running events. Mathathi won the bronze medal in the 10,000 metres at the 2007 World Championships in Osaka. He represented his country in the same event at the 2008 Summer Olympics. He holds the 10 miles world junior record of 44:51.He trains with PACE Sports Management.