Thomas Ayeko (born 10 February 1992)[1] is a Ugandan professional long-distance runner.

[2] His international debut came at the 2010 IAAF World Cross Country Championships, where he came 18th and helped Uganda to the junior bronze team medals.

[5] Ayeko stepped into the senior category in 2012 and began to focus on track running, running a 5000 m best of 13:23.25 minutes for second at the Memorial Primo Nebiolo and a 10,000 m best of 27:43.22 minutes in Birmingham.

[8] He was runner-up to Peter Kibet at that year's Ugandan 10,000 m championship race and went on to place eleventh at the 2013 World Championships in Athletics with a personal best run of 27:40.96 minutes.

He made his half marathon debut at the Great Birmingham Run in October and won the race in a time of 1:02:32 hours.