Home Postcodes by state QLD 4804 Postcode 4804 4804 is the postcode for 5 localities in QLD: Collinsville, Mount Coolon, Mount Wyatt, Newlands and Springlands. Localities with postcode 4804CollinsvilleQLDMount CoolonQLDMount WyattQLDNewlandsQLDSpringlandsQLD Postcode 4804 State or territory Queensland (QLD) Localities 5 Council area Whitsunday Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4803 · Postcode 4805