Tomas Dimša (born 2 January 1994) is a Lithuanian professional basketball player for Žalgiris Kaunas of the LKL and the EuroLeague.

Before starting his professional career, Dimša played in the NKL with the Žalgiris-Arvydas Sabonis school for four seasons.

On 15 May 2013, Dimša was brought into the main Žalgiris Kaunas roster for a game against Nizhny Novgorod in the VTB United League.

[1] On 19 August 2016, he signed with Vytautas Prienai–Birštonas of Lithuanian Basketball League (LKL),[2] and was a member of the team until contract's termination on 11 April 2018.

In 2014 coach Jonas Kazlauskas included Dimša into preliminary 24 players list for main Lithuania national basketball team.