Michael Staines (1885-1955) was an Irish republican and politician. He was born in Newport, County Mayo, his mother's home village, and where his father was serving as an RIC officer.
Staines was a member of the Irish Republican Brotherhood from 1902 and on its Supreme Council from 1921 to 1922. Staines took part in the 1916 Easter Rising and served as Quartermaster General in the GPO and was later interned at Frongoch. He was elected as a Sinn Féin MP for the Dublin St. Michan's constituency in the 1918 general election. He attended Dáil Éireann, working closely with the legal side of Government, as well as becoming a Dublin alderman. He was re-elected in 1921 and 1922 for the Dublin North West constituency.He later served in the Free State Seanad.
He was on the Grangegorman Mental Hospital Board. He is best remembered as the first commissioner of the Garda Síochána. The Staines family continue to be a prominent legal family.