Home Postcode finder NSW Lake Cowal Lake Cowal postcode NSW Lake Cowal is a locality in New South Wales covered by postcode 2671. Postcode 2671 State or territory New South Wales (NSW) Region Canberra Add a free Lake Cowal business listing Be the first listing in Lake Cowal Common questionsWhat is the postcode for Lake Cowal?Lake Cowal, NSW has the postcode 2671.What state is Lake Cowal in?Lake Cowal is in New South Wales (NSW).Does postcode 2671 cover more than one suburb?Yes. Postcode 2671 covers 7 localities, so the postcode alone does not identify Lake Cowal. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.