Home Postcodes by state QLD 4757 Postcode 4757 4757 is the postcode for 5 localities in QLD: Broken River, Crediton, Dalrymple Heights, Eungella and Eungella Dam. Localities with postcode 4757Broken RiverQLDCreditonQLDDalrymple HeightsQLDEungellaQLDEungella DamQLD Postcode 4757 State or territory Queensland (QLD) Localities 5 Council area Mackay Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4756 · Postcode 4798