Saint-Sébastien

• Name — Saint-Sébastien • Type — Municipality • Subdivision Type — Country • Subdivision Type1 — Province • Subdivision Type2 — Region • Subdivision Name2 — Estrie • Subdivision Type3 — RCM • Subdivision Name3 — Le Granit • Established Title1 — Constituted • Established Date1 — March 15, 1975 • Leader Title — Mayor • Leader Name — France Bisson • Leader Title1 — Federal riding • Leader Name1 — Mégantic—L'Érable • Leader Title2 — Prov. riding • Leader Name2 — Mégantic • Area Total Km2 — 91.10 • Area Land Km2 — 91.95 • Area Note — There is an apparent contradiction between two authoritative sources • Population Total — 674 • Population As Of — 2021 • Population Density Km2 — 7.3 • Population Blank1 Title — Pop 2016-2021 • Population Blank1 — 2.6% • Population Blank2 Title — Dwellings • Population Blank2 — 329 • Time Zone — EST • Utc Offset — −5 • Time Zone Dst — EDT • Utc Offset Dst — −4 • Postal Code Type — Postal code(s) • Postal Code — G0Y 1M0 • Area Code — 819 • Custom Label Sec1 — Highways

Settled in 1846 by people from Saint-Anselme, Sainte-Claire, Saint-Lambert (Lévis) and Saint-Charles-de-Bellechasse, they founded Aylmer in 1855. The church of Saint-Sébastien was completed in 1889. In 1904, a section of Aylmer was taken for the creation of Courcelles. In 1933, the village section of Aylmer split off to became Saint-Sébstien. In 1958 Aylmer also changed its name to Saint-Sébastien. In 1975, both Saint-Sébastien merged to create the current municipality of Saint-Sébastien.

In the 2021 Census of Population conducted by Statistics Canada, Saint-Sébastien had a population of living in of its total private dwellings, a change of from its 2016 population of. With a land area of 91.95 km2, it had a population density of sqmi in 2021.

The politician Madeleine Bélanger and the novelist Andrée A. Michaud were born in Saint-Sébastien.