Home Postcode finder QLD Park Ridge South Park Ridge South postcode QLD Park Ridge South is a locality in Queensland covered by postcode 4125. Postcode 4125 State or territory Queensland (QLD) Region Heathwood Add a free Park Ridge South business listing Be the first listing in Park Ridge South Common questionsWhat is the postcode for Park Ridge South?Park Ridge South, QLD has the postcode 4125.What state is Park Ridge South in?Park Ridge South is in Queensland (QLD).Does postcode 4125 cover more than one suburb?Yes. Postcode 4125 covers 3 localities, so the postcode alone does not identify Park Ridge South. Browse other postcodes in Queensland, or widen the search to every Australian postcode.