Saint-Paulin (French pronunciation: [sɛ̃ polɛ̃]) is a municipality in the Mauricie region of the province of Quebec in Canada.

In addition to the namesake main population centre, the municipality also include the village of Hunterstown (46°26′47″N 73°0′58″W / 46.44639°N 73.01611°W / 46.44639; -73.01611, named after Peter Hunter), and the hamlet of Renversy (46°23′50″N 73°0′55″W / 46.39722°N 73.01528°W / 46.39722; -73.01528)

Settlement began in 1824 with the construction of a sawmill in Hunterstown Township, that was already drawn up by 1795 on the Gale and Duberger map. In 1847, the parish of Saint-Paulin was formed when it split off from Saint-Léon-le-Grand. In 1855, the Parish Municipality of Saint-Paulin was established. In 1860, its post office opened. The village itself separated from the parish municipality in 1924 to form the Village Municipality of Saint-Paulin.

In 1988, the parish and village municipalities, together with the Township Municipality of Hunterstown (formed in 1861), merged to form the current Municipality of Saint-Paulin.

Historical census populations – Saint-Paulin, Quebec

Year Pop. ±% 1986 1,615 —     1991 1,556 −3.7% 1996 1,599 +2.8% 2001 1,576 −1.4%	Year Pop. ±% 2006 1,622 +2.9% 2011 1,534 −5.4% 2016 1,497 −2.4% 2021 1,541 +2.9%
Source: Statistics Canada

Private dwellings occupied by usual residents (2021): 717 (total dwellings: 794)

Mother tongue (2021):

• English as first language: 0.7%
• French as first language: 98.7%
• English and French as first language: 0.3%
• Other as first language: 0.3%

List of former mayors:

• Paul Boulanger (1988–1991, 1995–1999)
• Firmin St-Yves (1991)
• Jules Duhaime (1991–1995)
• Jacques Dupuis (1999)
• Marc-André Lessard (1999–2002)
• Brigitte Gagnon (2003–2013)
• Serge Dubé (2013–2020)
• Claude Frappier (2020–present)

• Media related to Saint-Paulin, Quebec at Wikimedia Commons
• Official website