Witherslack is a village in Cumbria, England.
It is situated within the LA11 postcode district, which is within the Grange-over-Sands post town.
LA11 is the only postcode district within the Grange-over-Sands post town.
The Grange-over-Sands post town is within the Lancaster postcode area.
Administrative Ward: Lyth Valley
Administrative District: South Lakeland
Administrative County: Cumbria
Country: England
UK Parliament: Westmorland and Lonsdale
NHS Local Health Authority: North West
NHS Region: North, Midlands and the East