Clamshell Islet is a Island located in Cowichan Land District, British Columbia.

• Latitude: 48° 51' 10'' North   (decimal: 48.8528000)
• Longitude: 123° 26' 25'' West   (decimal: -123.4403000)
• Topography Feature Category: Island
• Geographical Feature: Islet
• Canadian Province/Territory: British Columbia
• Location: Cowichan Land District
• Atlas of Canada Locator Map: Clamshell Islet
• GPS Coordinate Locator Map: Clamshell Islet Lat/Long