Home Postcode finder NSW Wolgan Valley Wolgan Valley postcode NSW Wolgan Valley is a locality in New South Wales covered by postcode 2790. Postcode 2790 State or territory New South Wales (NSW) Region NSW Country West Add a free Wolgan Valley business listing Be the first listing in Wolgan Valley Common questionsWhat is the postcode for Wolgan Valley?Wolgan Valley, NSW has the postcode 2790.What state is Wolgan Valley in?Wolgan Valley is in New South Wales (NSW).Does postcode 2790 cover more than one suburb?Yes. Postcode 2790 covers 40 localities, so the postcode alone does not identify Wolgan Valley. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.