Home Postcode finder QLD South Isis South Isis postcode QLD South Isis is a locality in Queensland covered by postcode 4660. Postcode 4660 State or territory Queensland (QLD) Region Sunshine Coast Add a free South Isis business listing Be the first listing in South Isis Common questionsWhat is the postcode for South Isis?South Isis, QLD has the postcode 4660.What state is South Isis in?South Isis is in Queensland (QLD).Does postcode 4660 cover more than one suburb?Yes. Postcode 4660 covers 21 localities, so the postcode alone does not identify South Isis. Browse other postcodes in Queensland, or widen the search to every Australian postcode.