Stewartby is a village in Bedfordshire, England.
It is situated within the MK43 postcode district, which is within the Bedford post town.
The full list of postcode districts within the Bedford post town is as follows:
The Bedford post town is within the Milton Keynes postcode area.
Administrative Ward: Elstow
Administrative District: Bedford
Country: England
UK Parliament: Mid Bedfordshire
NHS Local Health Authority: East of England
NHS Region: North, Midlands and the East