Langley is a village in Hertfordshire, England.
It is situated within the SG4 postcode district, which is within the Hitchin post town.
The full list of postcode districts within the Hitchin post town is as follows:
The Hitchin post town is within the Stevenage postcode area.
Administrative Ward: Knebworth
Administrative District: North Hertfordshire
Administrative County: Hertfordshire
Country: England
UK Parliament: Stevenage
NHS Local Health Authority: East of England
NHS Region: North, Midlands and the East