La Haute-Yamaska Regional County Municipality

La Haute-Yamaska
Coordinates: 45°24′N 72°44′W / 45.400°N 72.733°W / 45.400; -72.733
Country Canada
Province Quebec
RegionEstrie
EffectiveMarch 3, 1982
County seatGranby
Government
 • TypePrefecture
 • PrefectPascal Russell
Area
 • Total
650.40 km2 (251.12 sq mi)
 • Land636.00 km2 (245.56 sq mi)
Population
 (2021)
 • Total
92,796
 • Density145.9/km2 (378/sq mi)
 • Change
2016-2021
5.1%
 • Dwellings
41,563
Time zoneUTC−5 (EST)
 • Summer (DST)UTC−4 (EDT)
Area codes450 and 579
Websitewww.haute-yamaska.ca

La Haute-Yamaska (French pronunciation: [la ot jamaska], lit.'The Upper Yamaska') is a regional county municipality in the Estrie region of Quebec, Canada. Its seat is Granby.

It is named for its position at the height of the Yamaska River, which cuts through its southern part. It rises at Brome Lake located in neighbouring Brome-Missisquoi Regional County Municipality.

On January 1, 2010, the city of Bromont left La Haute-Yamaska; it was reclassified to the Brome-Missisquoi RCM.

In 2021, it was transferred to the Estrie region from Montérégie.