Weston Underwood is a village in Buckinghamshire, England.
It is situated within the MK46 postcode district, which is within the Olney post town.
MK46 is the only postcode district within the Olney post town.
The Olney post town is within the Milton Keynes postcode area.
Administrative Ward: Olney
Administrative District: Milton Keynes
Country: England
UK Parliament: Milton Keynes North
NHS Local Health Authority: South Central
NHS Region: Southern