Home Postcode finder NSW Martins Creek Martins Creek postcode NSW Martins Creek is a locality in New South Wales covered by postcode 2420. Postcode 2420 State or territory New South Wales (NSW) Region Hunter Add a free Martins Creek business listing More business listings in Martins Creek Businesses in Martins CreekMartins Creek Public School10 Cook St · 02 49385239 Common questionsWhat is the postcode for Martins Creek?Martins Creek, NSW has the postcode 2420.What state is Martins Creek in?Martins Creek is in New South Wales (NSW).Does postcode 2420 cover more than one suburb?Yes. Postcode 2420 covers 23 localities, so the postcode alone does not identify Martins Creek. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.