Tuomas Aho (born 27 May 1981) is a Finnish former professional footballer who played as a centre-back.

He made 371 appearances in the Veikkausliiga, and had a short stint abroad with Danish Superliga club AGF.

[5] On 23 December 2004, Aho signed with Danish Superliga club AGF after his contract with MyPa had expired.

[6] He made his debut on 20 March 2005, coming on as an substitute in stoppage time for Tobias Grahn in a 2–1 home win over Nordsjælland.

[12][13] On 13 March 2015, Aho signed a one-year contract with HIFK, who were newly promoted to the top division.