The Trent–Severn Waterway forms part of the northern border of the municipality, which enters Lake Simcoe through Ramara Township.

The township was named for Major General Sir Isaac Brock (1769–1812) whose estate received free land here for his service in the War of 1812.

Beaverton is the largest community and commercial centre of the township, while Cannington is home to the municipal administration and local high school.

Beaverton is the commercial and financial centre for the township, and several stores, services and entertainment facilities are located there.

[4] According to the 2016 Census, 94% of Brock residents have English as their mother tongue (one of the highest percentages in the Greater Toronto Area).