Home Postcode finder NSW Oyster Cove Oyster Cove postcode NSW Oyster Cove is a locality in New South Wales covered by postcode 2318. Postcode 2318 State or territory New South Wales (NSW) Region Hunter Add a free Oyster Cove business listing Be the first listing in Oyster Cove Common questionsWhat is the postcode for Oyster Cove?Oyster Cove, NSW has the postcode 2318.What state is Oyster Cove in?Oyster Cove is in New South Wales (NSW).Does postcode 2318 cover more than one suburb?Yes. Postcode 2318 covers 7 localities, so the postcode alone does not identify Oyster Cove. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.