Home Postcode finder SA Moerlong Moerlong postcode SA Moerlong is a locality in South Australia covered by postcode 5278. Postcode 5278 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Moerlong business listing Be the first listing in Moerlong Common questionsWhat is the postcode for Moerlong?Moerlong, SA has the postcode 5278.What state is Moerlong in?Moerlong is in South Australia (SA).Does postcode 5278 cover more than one suburb?Yes. Postcode 5278 covers 4 localities, so the postcode alone does not identify Moerlong. Browse other postcodes in South Australia, or widen the search to every Australian postcode.