The Historic St. Mary's Mission is a mission established by the Society of Jesus of the Catholic Church, located now on Fourth Street in modern-day Stevensville, Montana. Founded in 1841 and designed as an ongoing village for Catholic Salish Indians, St. Mary's was the first permanent settlement made by non-indigenous peoples in what became the state of Montana. The mission structure was rebuilt in 1866. It was listed on the National Register of Historic Places in 1970.