Home Postcodes by state QLD 4113 Postcode 4113 4113 is the postcode for 2 localities in QLD: Eight Mile Plains and Runcorn. Localities with postcode 4113Eight Mile PlainsQLDRuncornQLD Postcode 4113 State or territory Queensland (QLD) Localities 2 Council area Brisbane Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4112 · Postcode 4114