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

• Latitude: 50° 17' 58'' North   (decimal: 50.2995138)
• Longitude: 73° 45' 21'' West   (decimal: -73.7556950)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Lac Istotao
• GPS Coordinate Locator Map: Lac Istotao Lat/Long