Home Postcode finder NSW Round Swamp Round Swamp postcode NSW Round Swamp is a locality in New South Wales covered by postcode 2846. Postcode 2846 State or territory New South Wales (NSW) Region NSW Country West Add a free Round Swamp business listing Be the first listing in Round Swamp Common questionsWhat is the postcode for Round Swamp?Round Swamp, NSW has the postcode 2846.What state is Round Swamp in?Round Swamp is in New South Wales (NSW).Does postcode 2846 cover more than one suburb?Yes. Postcode 2846 covers 3 localities, so the postcode alone does not identify Round Swamp. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.