Martin O'Sullivan (1891 – 20 January 1956)[1] was an Irish Labour Party politician.
He was educated locally, and joined the Midland Great Western Railway as a clerk and worked in Sligo and Cavan before his appointment as station master at Recess, County Galway.
[1] He was prominent in the trade union movement, and was secretary and chairman of the Irish Council of Railway Clerks Association, chairman of the Dublin Council of Trade Unions, and a member of the national executive of the Irish Trades Union Congress.
[1] He was elected to Dáil Éireann as a Labour Party Teachta Dála (TD) for the Dublin North-West constituency at the 1943 general election.
[4] He served as Lord Mayor of Dublin from 1943 to 1945,[5] the first member of the Labour Party to hold the position.