Postcode 6603 This postcode covers more than one locality. Which one are you after? Lake Ninan Western Australia LGA: Wongan-Ballidu Konnongorring Western Australia LGA: Goomalling Lake Hinds Western Australia LGA: Wongan-Ballidu Mocardy Western Australia LGA: Wongan-Ballidu Wongan Hills Western Australia LGA: Wongan-Ballidu