Home Postcode finder QLD Mount Marshall Mount Marshall postcode QLD Mount Marshall is a locality in Queensland covered by postcode 4362. Postcode 4362 State or territory Queensland (QLD) Region Toowoomba Region Add a free Mount Marshall business listing Be the first listing in Mount Marshall Common questionsWhat is the postcode for Mount Marshall?Mount Marshall, QLD has the postcode 4362.What state is Mount Marshall in?Mount Marshall is in Queensland (QLD).Does postcode 4362 cover more than one suburb?Yes. Postcode 4362 covers 8 localities, so the postcode alone does not identify Mount Marshall. Browse other postcodes in Queensland, or widen the search to every Australian postcode.