Mattawa is a Town located in Nipissing, Ontario.

• Latitude: 46° 18' 47'' North   (decimal: 46.3130555)
• Longitude: 78° 42' 35'' West   (decimal: -78.7097222)
• Topography Feature Category: Town
• Geographical Feature: Town
• Canadian Province/Territory: Ontario
• Location: Nipissing
• Atlas of Canada Locator Map: Mattawa
• GPS Coordinate Locator Map: Mattawa Lat/Long