Home Postcode finder NSWRV Chain Valley Bay Chain Valley Bay postcode NSWRV Chain Valley Bay is a locality in New South Wales covered by postcode 2259. Postcode 2259 State or territory New South Wales (NSWRV) Region Gosford Add a free Chain Valley Bay business listing Be the first listing in Chain Valley Bay Common questionsWhat is the postcode for Chain Valley Bay?Chain Valley Bay, NSWRV has the postcode 2259.What state is Chain Valley Bay in?Chain Valley Bay is in New South Wales (NSWRV).Does postcode 2259 cover more than one suburb?Yes. Postcode 2259 covers 42 localities, so the postcode alone does not identify Chain Valley Bay. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.