Home Postcode finder QLD Southside Southside postcode QLD Southside is a locality in Queensland covered by postcode 4570. Postcode 4570 State or territory Queensland (QLD) Region Sunshine Coast Add a free Southside business listing More business listings in Southside Businesses in SouthsideBuilt Right Solutions Pty Ltd5 Gardenia Ct · (07) 5482 0714Pro Shield Pest Management118 Groundwater Rd, Southside QLD 4570, Australia · 61 40 880 5231Southern Cross Electrical Data109 Groundwater Rd, Southside QLD 4570, Australia · 0412932271 Common questionsWhat is the postcode for Southside?Southside, QLD has the postcode 4570.What state is Southside in?Southside is in Queensland (QLD).Does postcode 4570 cover more than one suburb?Yes. Postcode 4570 covers 85 localities, so the postcode alone does not identify Southside. Browse other postcodes in Queensland, or widen the search to every Australian postcode.