Looking for an individual postcode in Welwyn? Use our postcode finder tool.
Welwyn is a post town.
The Welwyn postcode town comprises the following postcode district(s):
The Welwyn postcode town is within the St Albans postcode area
(also known as the AL postcode area).
The postcodes of the other post towns within the St Albans postcode area are as follows:
Villages within the Welwyn post town:
