Martin I may refer to:
Pope Martin I (c. 590/600–655), bishop of Rome 649–655 Martin I (bishop of Oviedo) (died 1101) Martin I (archbishop of Gniezno) (died after 1112) Martin I of Aragon (1356–1410) Martin I of Sicily (1374/6–1409) Martin, Count of Ribagorza (r. 1533–1565 and 1573–1581), see County of Ribagorza
See also Saint Martin (disambiguation) San Martín (disambiguation) Martin II (disambiguation)