Home Postcodes by state QLD 4376 Postcode 4376 4376 is the postcode for Thulimbah, QLD. Localities with postcode 4376ThulimbahQLD Postcode 4376 State or territory Queensland (QLD) Localities 1 Council area Southern Downs Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4375 · Postcode 4377