John Thomas O'Farrell (1887 – 2 January 1971) was an Irish Labour Party politician and trade union official.
[1] He was born in Churchborough, County Roscommon in 1887, and was educated at the College of Commerce, Rathmines.
He was a member of the Railway Clerks' Association and served as the president of the Irish Trades Union Congress in 1927.
[2] He was an unsuccessful Labour Party candidate for the Dublin North-West constituency at the 1922 general election.
[1] He also stood unsuccessfully for the Dublin County constituency at the 1943 general election.