Lac Ghyslain is a Lake located in Lac-au-Brochet; La Haute-Côte-Nord, Quebec.

• Latitude: 49° 3' 34'' North   (decimal: 49.0594849)
• Longitude: 69° 8' 2'' West   (decimal: -69.1339414)
• Topography Feature Category: Lake
• Geographical Feature: Étang
• Canadian Province/Territory: Quebec
• Location: Lac-au-Brochet; La Haute-Côte-Nord
• Atlas of Canada Locator Map: Lac Ghyslain
• GPS Coordinate Locator Map: Lac Ghyslain Lat/Long