Lac du Coteau is a Lake located in Lac-Nilgaut; Pontiac, Quebec.

• Latitude: 46° 47' 43'' North   (decimal: 46.7953364)
• Longitude: 77° 21' 24'' West   (decimal: -77.3566792)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Nilgaut; Pontiac
• Atlas of Canada Locator Map: Lac du Coteau
• GPS Coordinate Locator Map: Lac du Coteau Lat/Long