Home Postcodes by state QLD 4521 Postcode 4521 4521 is the postcode for 8 localities in QLD: Campbells Pocket, Dayboro, King Scrub, Laceys Creek, Mount Mee, Mount Pleasant and 2 more. Localities with postcode 4521Campbells PocketQLDDayboroQLDKing ScrubQLDLaceys CreekQLDMount MeeQLDMount PleasantQLDOcean ViewQLDRush CreekQLD Postcode 4521 State or territory Queensland (QLD) Localities 8 Council area Moreton Bay Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4520 · Postcode 4550