St. Martin's or St. Martins may refer to:

Places St. Martins, Missouri, a city in the USA St Martin's, Isles of Scilly, an island off the Cornish coast, England St Martin's, North Yorkshire, England St Martins, Perth and Kinross, Scotland St Martin's, Shropshire, a village in England St Martin's, Guernsey, a parish in the Channel Islands St Martins (Hillingdon ward), a former electoral ward of Hillingdon London Borough Council that existed from 1978 to 2002 St Martin's (Lambeth ward), electoral ward of Lambeth, London, from 1978 to 2002, and since 2022 St Martins (Trafford ward), a former electoral ward of Trafford, Greater Manchester, from 1973 to 2003 Saint Martins Parish, New Brunswick, Canada Fundy-St. Martins, a village therein St Martins, New Zealand, a suburb of Christchurch, New Zealand St. Martin's Island, a coral reef island of Bangladesh in Bay of Bengal Saint Martin's Island a small island at the mouth of Green Bay in Wisconsin St. Martin's, Wisconsin, a former hamlet in the Town of Franklin, Milwaukee County, Wisconsin Saint Martins, Barbados, a village in Saint Philip Parish

Religion and folklore St. Martin's Church (disambiguation), churches dedicated to St Martin St. Martin's Day, or Martinmas, falling on November 11 St. Martin's Land, an enigmatic and likely mythical location associated with the legend of the green children of Woolpit

Education St Martin's Catholic Academy, a secondary school in Leicestershire, England St Martin's College, an institution of higher education in the United Kingdom Saint Martin's University, Lacey, Washington St Martin's School (disambiguation) Central Saint Martins, a school in London, UK

Sport St Martin's GAA (County Kilkenny), a Gaelic Athletic Association club based in the Ballyfoyle/Coon/Muckalee area of County Kilkenny, Ireland St. Martin's GAA (Wexford), a Gaelic Athletic Association club in Piercestown, County Wexford, Ireland

Other uses St. Martin's Press, a New York publisher St Martin's Theatre, in the West End of London St. Martins station, a SEPTA Regional Rail station in Philadelphia, Pennsylvania, United States

See also St. Martin (disambiguation)