Thomas Osano (born 4 June 1970) is a Kenyan former long-distance runner who competed across track, road, and cross country running disciplines. His greatest individual honour was a 10,000 metres gold medal at the 1991 All-Africa Games. He also shared in a team gold medal with Kenya at the 1993 IAAF World Half Marathon Championships. His best global placing was fourth at the 1991 World Championships in Athletics. Osano ran extensively in professional road races and among his victories were the Route du Vin Half Marathon, CPC Loop Den Haag, Bay to Breakers and Bolder Boulder.