williamstown postcode vic Home ›› Postcode Finder ›› VIC ›› Williamstown Williamstown local listingsThe suburb of Williamstown is located in VIC and has a postcode of 3016. Free williamstown business listing! 1Bayside P-12 CollegeKororoit Creek Rd 03 939713772Williamstown High School21-53 Bay View St 03 939992283Williamstown High School76 Pasco St 03 93971899 View more business listings in williamstown Search and find other Postcodes in Victoria or widen the search to Postcodes in Australia.