Home Postcode finder NSWRV Hamilton East Hamilton East postcode NSWRV Hamilton East is a locality in New South Wales covered by postcode 2303. Postcode 2303 State or territory New South Wales (NSWRV) Region Hunter Add a free Hamilton East business listing Be the first listing in Hamilton East Common questionsWhat is the postcode for Hamilton East?Hamilton East, NSWRV has the postcode 2303.What state is Hamilton East in?Hamilton East is in New South Wales (NSWRV).Does postcode 2303 cover more than one suburb?Yes. Postcode 2303 covers 3 localities, so the postcode alone does not identify Hamilton East. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.