Saint-Damien (formerly named Saint-Damien-de-Brandon) is a parish municipality of 2,020 inhabitants in Quebec, Canada. It is located in Matawinie Regional County Municipality in the Lanaudière region.
The town was founded the 6 September 1870. In French, people from the town are known as damiennois.
Saint-Damien is located in the middle of Lanaudière region near Saint-Gabriel-de-Brandon municipality, about 100 kilometres (62 mi) north of Montreal, 270 kilometres (170 mi) west of Québec, and 63 kilometres (39 mi) south of Taureau Reservoir. Main street is named "Rue Principale"  and it is served by Quebec Route 347 which runs from Quebec Route 158 at Saint Genevieve de Berthier (2 km west of exit 144 on Autoroute 40) through Saint-Gabriel-de-Brandon, Saint Damien, Sainte-Émélie-de-l'Énergie and Saint-Côme to Québec Route 125 in Notre Dame de la Merci.
The bordering municipalities  of Saint-Damien  are, starting from north-west and proceeding in a clockwise sense, Saint-Zénon (north-west), Mandeville Quebec (north-east, in D'Autray Regional County Municipality, Saint-Gabriel-de-Brandon (south-east, in D'Autray Regional County Municipality), Saint-Jean-de-Matha (south) and Sainte-Émélie-de-l'Énergie (west).
- Population in 2011: 2020 (2006 to 2011 population change: -7.3 %)
- Population in 2006: 2178
- 2001 to 2006 population change: 14.7%
- Population in 2001: 1983 (or 1899 when adjusted for 2006 boundaries)
- Population in 1996: 1760 (or 1777 when adjusted for 2001 boundaries)
- Population in 1991: 1505
Private dwellings occupied by usual residents: 979 (total dwellings: 1533)
- English as first language: 0.9%
- French as first language: 95.4%
- English and French as first language: 0.5%
- Other as first language: 3.2%