Home Postcodes by state QLD 4402 Postcode 4402 4402 is the postcode for 3 localities in QLD: Cooyar, Kooralgin and Upper Cooyar Creek. Localities with postcode 4402CooyarQLDKooralginQLDUpper Cooyar CreekQLD Postcode 4402 State or territory Queensland (QLD) Localities 3 Council area Toowoomba Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4401 · Postcode 4403