Silver Ayoo (born 26 November 1950) is a Ugandan former athlete who competed as a sprinter in 400 metre events.

Ayoo took part in the 400 metres race at the 1972 Summer Olympics and was eliminated in the opening heats.

[1] At the 1973 All-Africa Games in Lagos, Ayoo was a bronze medallist in the 400 metres hurdles.

[4] Back at the Olympics in 1980 he improved on his previous performance in the 400 metres by progressing to the quarter-finals.

He was also a member of Uganda's 4 × 400 metres relay team at those games.