Cromwell is a village in Nottinghamshire, England.
It is situated within the NG23 postcode district, which is within the Newark post town.
The full list of postcode districts within the Newark post town is as follows:
The Newark post town is within the Nottingham postcode area.
Administrative Ward: Muskham
Administrative District: Newark and Sherwood
Administrative County: Nottinghamshire
Country: England
UK Parliament: Newark
NHS Local Health Authority: East Midlands
NHS Region: North, Midlands and the East