Lac Sylvain is a Lake located in Sainte-Catherine-de-la-Jacques-Cartier; La Jacques-Cartier, Quebec.

• Latitude: 46° 50' 50'' North   (decimal: 46.8472445)
• Longitude: 71° 40' 13'' West   (decimal: -71.6703776)
• Topography Feature Category: Lake
• Geographical Feature: Lac artificiel
• Canadian Province/Territory: Quebec
• Location: Sainte-Catherine-de-la-Jacques-Cartier; La Jacques-Cartier
• Atlas of Canada Locator Map: Lac Sylvain
• GPS Coordinate Locator Map: Lac Sylvain Lat/Long