The Mission district is an inner city neighbourhood of Calgary, Alberta, Canada, that originated as Notre Dame de la Paix, a Catholic mission and was for a time the incorporated Village of Rouleauville.

Mission is bordered by 4th Street SW with restaurants and shops, and it hosts the Lilac Festival in June.

In 1883, Oblate missionary Father Albert Lacombe, returning after a ten-year absence, obtained two quarter sections of land for a "Mission district" to ensure a strong French-speaking Catholic community.

After obtaining the rest of the land that is now Mission, the area was incorporated on November 2, 1899, as the Village of Rouleauville, named after Charles Rouleau.

[8] In the latter part of his life, Lacombe helped found a number of Catholic schools throughout the West, including St. Mary's School in 1885, initially using a two-storey log cabin convent in Mission district (Rouleauville).