Home Postcode finder QLD Silkstone Silkstone postcode QLD Silkstone is a locality in Queensland covered by postcode 4304. Postcode 4304 State or territory Queensland (QLD) Region Western Suburbs Add a free Silkstone business listing More business listings in Silkstone Businesses in SilkstonePatios Ipswich Specialists12 Coolibah St, Silkstone QLD 4304, Australia · +61734633788Silkstone Baptist Community Kindergarten169 Blackstone RoadSilkstone State SchoolMolloy St · 07 32812001 Common questionsWhat is the postcode for Silkstone?Silkstone, QLD has the postcode 4304.What state is Silkstone in?Silkstone is in Queensland (QLD).Does postcode 4304 cover more than one suburb?Yes. Postcode 4304 covers 7 localities, so the postcode alone does not identify Silkstone. Browse other postcodes in Queensland, or widen the search to every Australian postcode.