Mont-Saint-Grégoire (French pronunciation: [mɔ̃ sɛ̃ ɡʁeɡwaʁ]) is a municipality in the province of Quebec, Canada, located in the Regional County Municipality of Le Haut-Richelieu. The population as of the Canada 2021 Census was 3,136. Residents of Mont-Saint-Grégoire are called Grégoriens (Grégoriennes, fem.).

Mont-Saint-Grégoire was named for Gregory the Great, pope from 590 to 604, who was succeeded by Sabinian.

Saint André Bessette was born in Mont-Saint-Grégoire.

The municipality has the privilege of having on its territory Mont Saint-Grégoire, a small Monteregian hill whose summit reaches 251 meters. The mountain is largely covered by a sugar maple forest, offering magnificent fall colors.

All around there are only flat lands occupied by apple orchards, corn, soya and other cereal crops. On the horizon emerge the agricultural silos of dairy farms.

Its territory is crossed by the important Route 104 which connects La Prairie to Lac-Brome via the nearby city of Saint-Jean-sur-Richelieu.

Historical Census Data - Mont-Saint-Grégoire, Quebec

Year Pop. ±% 1996 3,112 —     2001 3,102 −0.3%

Year Pop. ±% 2006 2,922 −5.8% 2011 3,086 +5.6%

Year Pop. ±% 2016 3,077 −0.3% 2021 3,136 +1.9%

Canada Census Mother Tongue - Mont-Saint-Grégoire, Quebec
Census		Total		French				English				French & English				Other
Year		Responses		Count	Trend	Pop %		Count	Trend	Pop %		Count	Trend	Pop %		Count	Trend	Pop %
2021		3,140		2,995	1.4%	95.4%		60	20.0%	1.9%		35	133.3%	1.1%		40	11.1%	1.3%
2016		3,070		2,955	0.7%	96.3%		50	0.0%	1.6%		15	25.0%	0.5%		45	50.0%	1.5%
2011		3,075		2,975	6.4%	96.8%		50	100.0%	1.6%		20	100.0%	0.7%		30	60.0%	1.0%
2006		2,905		2,795	6.7%	96.2%		25	66.7%	0.9%		10	60.0%	0.3%		75	25.0%	2.6%
2001		3,095		2,995	0.3%	96.8%		15	72.7%	0.5%		25	n/a%	0.8%		60	100.0%	1.9%
1996		3,090		3,005	n/a	97.3%		55	n/a	1.8%		0	n/a	0.0%		30	n/a	1.0%

• List of municipalities in Quebec

• Media related to Mont-Saint-Grégoire at Wikimedia Commons
• Mont-Saint-Grégoire official website