Lac Portugais is a Lake located in Baie-d'Hudson; Kativik, Quebec.

• Latitude: 57° 37' 16'' North   (decimal: 57.6211111)
• Longitude: 75° 17' 57'' West   (decimal: -75.2991667)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Baie-d'Hudson; Kativik
• Atlas of Canada Locator Map: Lac Portugais
• GPS Coordinate Locator Map: Lac Portugais Lat/Long