Home Postcode finder VIC Bittern Bittern postcode VIC Bittern is a locality in Victoria covered by postcode 3918. Postcode 3918 State or territory Victoria (VIC) Region Frankston Add a free Bittern business listing More business listings in Bittern Businesses in BitternAbsolute Carpet CleaningServicing Mornington Peninsula · (03) 5983-9141Bittern Primary School10 Portsmouth Rd · 03 59839590Lodeveld Contracting7 Lens Street, Bittern VIC, Australia · 0408 535 633 Common questionsWhat is the postcode for Bittern?Bittern, VIC has the postcode 3918.What state is Bittern in?Bittern is in Victoria (VIC).Does postcode 3918 cover more than one suburb?No. Postcode 3918 covers Bittern only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Victoria, or widen the search to every Australian postcode.