Home Postcodes by state QLD 4178 Postcode 4178 4178 is the postcode for 6 localities in QLD: Lytton, Port Of Brisbane, Wynnum, Wynnum North, Wynnum West and Wynnum Plaza. Localities with postcode 4178LyttonQLDPort Of BrisbaneQLDWynnumQLDWynnum NorthQLDWynnum PlazaQLDWynnum WestQLD Postcode 4178 State or territory Queensland (QLD) Localities 6 Council area Brisbane Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4174 · Postcode 4179