Richard Óge Martyn (c. 1602 – 1648) was a Galway lawyer and member of the Catholic Confederates of Ireland.
He worked with his brother-in-law and first cousin, Patrick D'Arcy, against the Plantation of Connaught in the 1630s, and served on the Supreme Council of the Confederate Catholics in the 1640s.
Friends and acquaintances included John Lynch, Mary Bonaventure Browne, and Sir Dermott Ó Seachnasaigh.
His contemporaries included Mícheál Ó Cléirigh and Randal MacDonnell, 1st Marquess of Antrim.
He is an ancestor of both the first president of Sinn Féin, Edward Martyn (1859–1923), and the leader of the Irish Unionist Alliance and Ulster Unionist Party Edward Carson, Baron Carson (1854–1935).