Home Postcode finder NSW Wymah Wymah postcode NSW Wymah is a locality in New South Wales covered by postcode 2640. Postcode 2640 State or territory New South Wales (NSW) Region Canberra Add a free Wymah business listing Be the first listing in Wymah Common questionsWhat is the postcode for Wymah?Wymah, NSW has the postcode 2640.What state is Wymah in?Wymah is in New South Wales (NSW).Does postcode 2640 cover more than one suburb?Yes. Postcode 2640 covers 16 localities, so the postcode alone does not identify Wymah. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.