Saint Martin may refer to:
- Saint Martin of Tours (c. 316–397), Bishop of Tours, France
- Saint Martin of Braga (c. 520–580), archbishop of Bracara Augusta in Gallaecia (now Braga in Portugal)
- Pope Martin I (598–655)
- Saint Martin of Arades (died 726), canonized monk from Corbie Abbey whose feast day is November 26
- Saint Martin of Soure (died 1146), Portuguese cleric canonized after martyrdom to the Moors of Cordoba
- Saint Martin de Porres (1579–1639), Peruvian lay brother of the Dominican Order
- Saints Martin Tho and Martin Tinh Duc Ta, two Vietnamese Martyrs who died between 1745 and 1862
- Saint-Martin station (Laval, Quebec), a former commuter rail station in Canada
- Saint-Martin (Paris Métro), a former Paris Métro station
- Saint-Martin-d'Étampes (Paris RER), a railroad station in Étampes, Essonne, France
- Gare de Caen Saint-Martin, a former railroad station in Caen, France
- San Martin station, a commuter rail station in San Martin, California, USA