Greatstone-on-Sea is a village in Kent, England.
It is situated within the TN28 postcode district, which is within the New Romney post town.
TN28 is the only postcode district within the New Romney post town.
The New Romney post town is within the Tonbridge postcode area.
Administrative Ward: New Romney Coast
Administrative District: Shepway
Administrative County: Kent
Country: England
UK Parliament: Folkestone and Hythe
NHS Local Health Authority: South East Coast
NHS Region: Southern