Home Postcode finder QLD Mount Maria Mount Maria postcode QLD Mount Maria is a locality in Queensland covered by postcode 4674. Postcode 4674 State or territory Queensland (QLD) Region Sunshine Coast Add a free Mount Maria business listing Be the first listing in Mount Maria Common questionsWhat is the postcode for Mount Maria?Mount Maria, QLD has the postcode 4674.What state is Mount Maria in?Mount Maria is in Queensland (QLD).Does postcode 4674 cover more than one suburb?Yes. Postcode 4674 covers 9 localities, so the postcode alone does not identify Mount Maria. Browse other postcodes in Queensland, or widen the search to every Australian postcode.