Mercaston is a village in Derbyshire, England.
It is situated within the DE6 postcode district, which is within the Ashbourne post town.
DE6 is the only postcode district within the Ashbourne post town.
The Ashbourne post town is within the Derby postcode area.
Administrative Ward: South West Parishes
Administrative District: Amber Valley
Administrative County: Derbyshire
Country: England
UK Parliament: Derbyshire Dales
NHS Local Health Authority: East Midlands
NHS Region: North, Midlands and the East