Home Postcode finder QLD Mount Macarthur Mount Macarthur postcode QLD Mount Macarthur is a locality in Queensland covered by postcode 4723. Postcode 4723 State or territory Queensland (QLD) Region Central QLD Add a free Mount Macarthur business listing Be the first listing in Mount Macarthur Common questionsWhat is the postcode for Mount Macarthur?Mount Macarthur, QLD has the postcode 4723.What state is Mount Macarthur in?Mount Macarthur is in Queensland (QLD).Does postcode 4723 cover more than one suburb?Yes. Postcode 4723 covers 11 localities, so the postcode alone does not identify Mount Macarthur. Browse other postcodes in Queensland, or widen the search to every Australian postcode.