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

• Latitude: 46° 31' 22'' North   (decimal: 46.5227778)
• Longitude: 77° 4' 40'' West   (decimal: -77.0777778)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Nilgaut; Pontiac
• Atlas of Canada Locator Map: Lac S
• GPS Coordinate Locator Map: Lac S Lat/Long