William 'Chege' Ouma is a Kenyan former footballer who played as a forward.
Ouma played for Luo Union F.C. from 1964 to 1974 before joining Gor Mahia where he stayed for four years. From 1978 he spent two years at Kisumu Hotstars. He is record goalscorer of the Kenya national team with 35 goals, scored in 66 appearances between 1965 and 1977.
In November 1968 Ouma received a nine-month jail sentence for attacking two other players with a meat cleaver in a drunken fight over a girl.