Michael Duffy (died 1957) was an Irish Labour Party politician and trade union official from Dunshaughlin, County Meath. ^{[1] [2]}

He was a member of Seanad Éireann from 1922 to 1936. He was a member of the Irish Transport and General Workers' Union and served as the president of the Irish Trades Union Congress in 1934. ^[3] He was elected to the Free State Seanad for 9 years at the 1922 election, and was re-elected for another 9 years at the 1931 election. ^[1] He served until the Free State Seanad was abolished in 1936. He died in 1957. ^[4]