Sainte-Marthe (French pronunciation: [sɛ̃t maʁt]) is a municipality located in the Vaudreuil-Soulanges Regional County Municipality of Quebec, Canada. The population as of the 2021 Canadian census was 1,014.

The local economy is based almost exclusively on agriculture.

Settlement began in 1835 with the arrival of Irish immigrants. In 1846, the parish was founded and named after Martha, the sister of Lazarus, since the neighbouring parish was called Saint-Lazare.

That same year, the Municipality of Sainte Marthe was created out of the Municipality of Rigaud, but abolished on September 1, 1847. In 1851, its post office opened. On July 1, 1855, the municipality was reestablised, which became a parish municipality in 1857.

In 1928, the village itself separated from the surrounding rural parish and became the Village Municipality of Sainte-Marthe.

On December 27, 1980, the parish and village merged to form the Municipality of Sainte-Marthe.

On 5–6 April 2023, a storm of black ice caused 623 person to lose electricity.

Historical Census Data - Sainte-Marthe, Quebec

Year Pop. ±% 1976 1,046 —     1981 1,099 +5.1% 1986 1,055 −4.0% 1991 1,056 +0.1% 1996 1,090 +3.2%	Year Pop. ±% 2001 1,094 +0.4% 2006 1,080 −1.3% 2011 1,075 −0.5% 2016 1,097 +2.0% 2021 1,014 −7.6%
Population amounts prior to 1980 are total of Sainte-Marthe Village and Sainte-Marthe Parish. Source: Statistics Canada

Canada Census Mother Tongue - Sainte-Marthe, Quebec
Census		Total		French				English				French & English				Other
Year		Responses		Count	Trend	Pop %		Count	Trend	Pop %		Count	Trend	Pop %		Count	Trend	Pop %
2011		1,075		875	1.7%	81.40%		150	3.4%	13.95%		15	40.0%	1.40%		35	133.3%	3.25%
2006		1,075		890	5.8%	82.79%		145	20.8%	13.49%		25	150.0%	2.32%		15	0.0%	1.40%
2001		1,090		945	9.9%	86.70%		120	11.1%	11.01%		10	0.0%	0.92%		15	83.3%	1.38%
1996		1,095		860	n/a	78.54%		135	n/a	12.33%		10	n/a	0.91%		90	n/a	8.22%

List of former mayors (since formation of current municipality):

• Léon-Henri Bourbonnais (1980–1984)
• Joseph Antoine Wilfrid Germain Roy (1984–1994)
• Joseph Aimé Jean Guy Durocher (1994–2005)
• Aline Guillotte (2005–2017)
• François Pleau (2017–present)

Commission Scolaire des Trois-Lacs operates Francophone schools.

• École Sainte-Marthe

Lester B. Pearson School Board operates Anglophone schools.

• Soulanges Elementary School in Saint-Télesphore or Evergreen Elementary and Forest Hill Elementary (Junior Campus and Senior campus) in Saint-Lazare

• List of anglophone communities in Quebec
• List of municipalities in Quebec

• Media related to Sainte-Marthe, Quebec at Wikimedia Commons