Thomas Keen (born 16 June 2001) is a British middle distance and cross country runner.

[2] As successful junior, he won the European under-18 3000m title in 2018 in Győr.

[3] In 2020, he broke the British junior 1,500m record whilst racing for England at the Indoor Classic in Vienna, running 3:41.44.

[4] After moving into the senior ranks, he ran a 1500m PB of 3:36.34 in Australia in February 2024.

[5] In March 2024, he was a bronze medalist in the mixed relay at the 2024 World Cross Country Championships in Belgrade.