Home Postcodes by state QLD 4374 Postcode 4374 4374 is the postcode for Dalveen, QLD. Localities with postcode 4374DalveenQLD Postcode 4374 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 4373 · Postcode 4375