Brock, township in south-central Ontario, in the Regional Municipality of Durham in the Greater Toronto Area. The main centres in Brock are the towns of Sunderland , Cannington , and Beaverton.

Communities

• Ball Subdivision
• Beaverton
• Blackwater
• Cannington
• Cedar Beach
• Creightons Corners
• Derryville
• Gamebridge
• Layton
• Maple Beach
• Pinedale
• Saginaw
• Sunderland
• Thorah Beach
• Vallentyne
• Vroomanton
• Wick
• Wilfrid

According to the 2001 Statistics Canada Census:

• Population: 12,110
• % Change (1996-2001): 3.5
• Dwellings: 4,866
• Area (sq. km.): 423.73
• Density (persons per sq. km.): 28.6