|Coordinates||77°51′N 114°27′W / 77.850°N 114.450°WCoordinates: 77°51′N 114°27′W / 77.850°N 114.450°W|
|Archipelago||Queen Elizabeth Islands|
|Area||764 km2 (295 sq mi)|
|Length||41 km (25.5 mi)|
|Width||39 km (24.2 mi)|
Brock Island is one of the uninhabited members of the Queen Elizabeth Islands of the Arctic Archipelago located in the Northwest Territories, Canada. Located at 77°51'N 114°27'W, it measures 764 km2 (295 sq mi) in size and lies close to Mackenzie King Island. The first known sighting of the island by a European was by Vilhjalmur Stefansson in 1915 and it was later named for Reginald W. Brock, Dean of Applied Science at the University of British Columbia.