Tourism is a major industry in the village of Knowlton because of skiing in the winter, lake activities in summer, and autumn leaf colour.

In 1971, seven villages on Brome Lake (Bondville, East Hill, Foster, Fulford, Knowlton, Iron Hill, and West Brome) were amalgamated to create the current town, which is now in the Brome-Missisquoi Regional County Municipality of the Estrie administrative region.

Quaternary glaciation left deposits of stony loam till plus outwash sands and gravels.

[7] Brome Lake has one radio station serving its local area, the Knowlton-based CIDI-FM 99.1 MHz.

In 1968, Paramount Studios chose Knowlton as the location to film the children's movie My Side of the Mountain, an adaptation of a book by Jean Craighead George.