Tantallon (pronounced 'tan-TAL-en') is a exurban community in Halifax Regional Municipality, Nova Scotia, Canada. It extends from about two kilometers south of Trunk 3, along Route 333, just north of Ballfield Road, for roughly three kilometers along Route 333, to just south of Longards road, and includes Whynachts Point and Sheeps Head Island. It is bordered to the north by Upper Tantallon and to the south by Glen Haven. The community is about 32 km (20 mi) from Downtown Halifax. The community is likely named for Tantallon Castle in Scotland.