Home Postcode finder QLD Mount Edwards Mount Edwards postcode QLD Mount Edwards is a locality in Queensland covered by postcode 4309. Postcode 4309 State or territory Queensland (QLD) Region Western Suburbs Add a free Mount Edwards business listing Be the first listing in Mount Edwards Common questionsWhat is the postcode for Mount Edwards?Mount Edwards, QLD has the postcode 4309.What state is Mount Edwards in?Mount Edwards is in Queensland (QLD).Does postcode 4309 cover more than one suburb?Yes. Postcode 4309 covers 17 localities, so the postcode alone does not identify Mount Edwards. Browse other postcodes in Queensland, or widen the search to every Australian postcode.