Lac Mary is a Lake located in Otter Lake; Pontiac, Quebec.

• Latitude: 45° 58' 14'' North   (decimal: 45.9705556)
• Longitude: 76° 23' 48'' West   (decimal: -76.3966667)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Otter Lake; Pontiac
• GPS Coordinate Locator Map: Lac Mary Lat/Long