Home Postcodes by state VIC 3783 Postcode 3783 3783 is the postcode for Gembrook, VIC. Localities with postcode 3783GembrookVIC Postcode 3783 State or territory Victoria (VIC) Localities 1 Council area Cardinia Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3782 · Postcode 3785