Home Postcode finder VIC Merlynston Merlynston postcode VIC Merlynston is a locality in Victoria covered by postcode 3058. Postcode 3058 State or territory Victoria (VIC) Region Preston Add a free Merlynston business listing Be the first listing in Merlynston Common questionsWhat is the postcode for Merlynston?Merlynston, VIC has the postcode 3058.What state is Merlynston in?Merlynston is in Victoria (VIC).Does postcode 3058 cover more than one suburb?Yes. Postcode 3058 covers 5 localities, so the postcode alone does not identify Merlynston. Browse other postcodes in Victoria, or widen the search to every Australian postcode.