Denis Larkin (1908 – 2 July 1987) was an Irish Labour Party politician and trade union official. He was the son of Dublin trade union leader, James Larkin. He was first elected to Dáil Éireann as a Labour Party Teachta Dála (TD) for the Dublin North–East constituency at the 1954 general election and was re-elected at the 1957 general election. He lost his seat at the 1961 general election but was re-elected at the 1965 general election. He did not contest the 1969 general election. He served as Lord Mayor of Dublin from 1955 to 1956.