Clapham is a village in West Sussex, England.
It is situated within the BN13 postcode district, which is within the Worthing post town.
The full list of postcode districts within the Worthing post town is as follows:
The Worthing post town is within the Brighton postcode area.
Administrative Ward: Findon
Administrative District: Arun
Administrative County: West Sussex
Country: England
UK Parliament: Arundel and South Downs
NHS Local Health Authority: South East Coast
NHS Region: Southern