Home Postcode finder NSW Deua River Valley Deua River Valley postcode NSW Deua River Valley is a locality in New South Wales covered by postcode 2537. Postcode 2537 State or territory New South Wales (NSW) Region NSW Country West Add a free Deua River Valley business listing Be the first listing in Deua River Valley Common questionsWhat is the postcode for Deua River Valley?Deua River Valley, NSW has the postcode 2537.What state is Deua River Valley in?Deua River Valley is in New South Wales (NSW).Does postcode 2537 cover more than one suburb?Yes. Postcode 2537 covers 17 localities, so the postcode alone does not identify Deua River Valley. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.