Lac Plat is a Lake located in Rivière-Mistassini; Maria-Chapdelaine, Quebec.

• Latitude: 50° 16' 56'' North   (decimal: 50.2822222)
• Longitude: 72° 21' 10'' West   (decimal: -72.3527778)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Mistassini; Maria-Chapdelaine
• Atlas of Canada Locator Map: Lac Plat
• GPS Coordinate Locator Map: Lac Plat Lat/Long