Home Postcode finder VIC Mornington Mornington postcode VIC Mornington is a locality in Victoria covered by postcode 3931. Postcode 3931 State or territory Victoria (VIC) Region Frankston Add a free Mornington business listing More business listings in Mornington Businesses in Mornington1300 Our PlumberMain Street · 1300687758A Southern Peninsula GlassSatu Way · 0359753911AAA Peninsula Locksmiths16 Weerona Way, Mornington VIC 3931, Australia · 0411126958 Common questionsWhat is the postcode for Mornington?Mornington, VIC has the postcode 3931.What state is Mornington in?Mornington is in Victoria (VIC).Does postcode 3931 cover more than one suburb?No. Postcode 3931 covers Mornington only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Victoria, or widen the search to every Australian postcode.