Lac Gwynneth is a Lake located in Baie-James; Jamésie, Quebec.

• Latitude: 51° 8' 8'' North   (decimal: 51.1355556)
• Longitude: 72° 34' 16'' West   (decimal: -72.5711111)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Lac Gwynneth
• GPS Coordinate Locator Map: Lac Gwynneth Lat/Long