Grassy Bay is a Bay located in Renfrew, Ontario and has an elevation of 165 meters.

• Latitude: 45° 16' 51'' North   (decimal: 45.2808333)
• Longitude: 76° 42' 54'' West   (decimal: -76.7150000)
• Topography Feature Category: Bay
• Geographical Feature: Bay
• Canadian Province/Territory: Ontario
• Elevation: 165 meters
• Location: Renfrew
• Atlas of Canada Locator Map: Grassy Bay
• GPS Coordinate Locator Map: Grassy Bay Lat/Long