Lac Sainte-Marie is a Lake located in Lac-Nilgaut; Pontiac, Quebec.

• Latitude: 46° 44' 18'' North   (decimal: 46.7383921)
• Longitude: 77° 23' 15'' West   (decimal: -77.3875140)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Nilgaut; Pontiac
• Atlas of Canada Locator Map: Lac Sainte-Marie
• GPS Coordinate Locator Map: Lac Sainte-Marie Lat/Long