Thomas Hamer (born 16 August 1998) is an English British swimmer.

[1] Hamer is Commonwealth, European & World Champion.

Hamer competes mainly in freestyle and individual medley preferring shorter distances.

His first international competition was in 2014 Commonwealth Games Glasgow and took a silver medal in the 200m freestyle at 15 years of age.

Hamer holds the British records for S14 50m, 200m, and 400m freestyle events, and the SM14 200m individual medley.