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

• Latitude: 49° 33' 32'' North   (decimal: 49.5589354)
• Longitude: 69° 51' 39'' West   (decimal: -69.8609465)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-au-Brochet; La Haute-Côte-Nord
• Atlas of Canada Locator Map: Lac Siffleur
• GPS Coordinate Locator Map: Lac Siffleur Lat/Long