Home Postcode finder NSWDL Sun Valley Sun Valley postcode NSWDL Sun Valley is a locality in New South Wales covered by postcode 2777. Postcode 2777 State or territory New South Wales (NSWDL) Region Nepean Add a free Sun Valley business listing Be the first listing in Sun Valley Common questionsWhat is the postcode for Sun Valley?Sun Valley, NSWDL has the postcode 2777.What state is Sun Valley in?Sun Valley is in New South Wales (NSWDL).Does postcode 2777 cover more than one suburb?Yes. Postcode 2777 covers 6 localities, so the postcode alone does not identify Sun Valley. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.