Home Postcodes by state QLD 4876 Postcode 4876 4876 is the postcode for 5 localities in QLD: Bamaga, Injinoo, New Mapoon, Seisia and Umagico. Localities with postcode 4876BamagaQLDInjinooQLDNew MapoonQLDSeisiaQLDUmagicoQLD Postcode 4876 State or territory Queensland (QLD) Localities 5 Council area Northern Peninsula Area Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4875 · Postcode 4877