Saint-Damien is located in the middle of Lanaudière region near Saint-Gabriel-de-Brandon municipality, about 100km north of Montreal, 270km west of Québec, and 63km south of Taureau Reservoir.
The bordering municipalities [REF] of Saint-Damien [REF] are, starting from northwest and proceeding clockwise, Saint-Zénon (northwest), Mandeville (northeast, in D'Autray Regional County Municipality), Saint-Gabriel-de-Brandon (southeast, in D'Autray Regional County Municipality), Saint-Jean-de-Matha (south) and Sainte-Émélie-de-l'Énergie (west).