Home Postcodes by state VIC 3016 Postcode 3016 3016 is the postcode for 2 localities in VIC: Williamstown and Williamstown North. Localities with postcode 3016WilliamstownVICWilliamstown NorthVIC Postcode 3016 State or territory Victoria (VIC) Localities 2 Council area Hobsons Bay Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3015 · Postcode 3018