Lac Square Rock is a Lake located in Baie-James; Jamésie, Quebec.

• Latitude: 53° 34' 21'' North   (decimal: 53.5725)
• Longitude: 70° 45' 57'' West   (decimal: -70.7658333)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Lac Square Rock
• GPS Coordinate Locator Map: Lac Square Rock Lat/Long