Home Postcode finder QLD Wynnum Wynnum postcode QLD Wynnum is a locality in Queensland covered by postcode 4178. Postcode 4178 State or territory Queensland (QLD) Region Brisbane Central Add a free Wynnum business listing More business listings in Wynnum Businesses in WynnumA & A Autos16 Thorne St, Wynnum QLD 4178, Australia · (07) 3396 5697A Bailey Plumbing- Rheem Solar Specialist1/70 Andrew Street, Wynnum QLD, Australia · (07) 3901 0160Advantage Healthcare & Physiotherapy90 Tingal Road, Wynnum QLD, Australia · +61 7 3396 7775 Common questionsWhat is the postcode for Wynnum?Wynnum, QLD has the postcode 4178.What state is Wynnum in?Wynnum is in Queensland (QLD).Does postcode 4178 cover more than one suburb?Yes. Postcode 4178 covers 6 localities, so the postcode alone does not identify Wynnum. Browse other postcodes in Queensland, or widen the search to every Australian postcode.