Home Postcode finder QLD Mount Marrow Mount Marrow postcode QLD Mount Marrow is a locality in Queensland covered by postcode 4306. Postcode 4306 State or territory Queensland (QLD) Region Western Suburbs Add a free Mount Marrow business listing More business listings in Mount Marrow Businesses in Mount MarrowMt Marrow State School272 Haigslea Thagoona Rd · 07 54641358 Common questionsWhat is the postcode for Mount Marrow?Mount Marrow, QLD has the postcode 4306.What state is Mount Marrow in?Mount Marrow is in Queensland (QLD).Does postcode 4306 cover more than one suburb?Yes. Postcode 4306 covers 56 localities, so the postcode alone does not identify Mount Marrow. Browse other postcodes in Queensland, or widen the search to every Australian postcode.