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.

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

Mother tongue from Canada 2021 Census[3] Highways and numbered routes that run through the municipality, including external routes that start or finish at the county border:[7]