Grassy Bay is a Bay located in Renfrew, Ontario and has an elevation of 173 meters.

• Latitude: 45° 37' 16'' North   (decimal: 45.6211111)
• Longitude: 77° 28' 24'' West   (decimal: -77.4733333)
• Topography Feature Category: Bay
• Geographical Feature: Bay
• Canadian Province/Territory: Ontario
• Elevation: 173 meters
• Location: Renfrew
• Atlas of Canada Locator Map: Grassy Bay
• GPS Coordinate Locator Map: Grassy Bay Lat/Long