D'Autray (French pronunciation: [dotʁɛ]) is a regional county municipality in the Lanaudière region of Quebec, Canada. Its seat is Berthierville.

The municipality has a land area of 1,249.30 km and its population was 42,189 inhabitants as of the 2016 Census. Its largest community is the city of Lavaltrie.

There are 15 subdivisions within the RCM:

Historical census data - D'Autray Regional County Municipality, Quebec

Year Pop. ±% 1991 32,979 —     1996 37,553 +13.9% 2001 38,347 +2.1% 2001A 38,431 +0.2%	Year Pop. ±% 2006 40,321 +4.9% 2011 41,650 +3.3% 2016 42,189 +1.3%
(A) adjusted figure due to boundary change.

Canada Census mother tongue - D'Autray Regional County Municipality, Quebec
Census		Total		French				English				French & English				Other
Year		Responses		Count	Trend	Pop %		Count	Trend	Pop %		Count	Trend	Pop %		Count	Trend	Pop %
2016		41,705		40,525	0.9%	97.2%		415	2.4%	1.0%		175	5.4%	0.4%		590	45.7%	1.4%
2011		41,190		40,175	4.1%	97.5%		425	12.4%	1.0%		185	131.2%	0.5%		405	36.2%	1.0%
2006		39,800		38,600	5.6%	96.98%		485	2.0%	1.22%		80	56.8%	0.20%		635	81.4%	1.60%
2001		37,585		36,555	1.0%	97.26%		495	76.8%	1.32%		185	37.0%	0.49%		350	62.8%	0.93%
1996		36,840		36,210	n/a	98.29%		280	n/a	0.76%		135	n/a	0.37%		215	n/a	0.58%

Highways and numbered routes that run through the municipality, including external routes that start or finish at the county border:

• List of regional county municipalities and equivalent territories in Quebec

• MRC d'Autray