Members of the Fourth Dáil - Thomas O'Mahony

Thomas O'Mahony (died 20 July 1924) was an Irish Cumann na nGaedhael Party politician who sat as a Teachta Dála (TD) in Dáil Éireann in the 1920s.

In the 1923 general election, he was elected by the constituency of Cork East to the 4th Dáil. He died less than a year later, on 20 July 1924. The by-election for his Dáil seat was held on 18 November 1924, and won by the Cumann na nGaedhael candidate Michael K. Noonan.