Home Postcode finder QLD Meridan Plains Meridan Plains postcode QLD Meridan Plains is a locality in Queensland covered by postcode 4551. Postcode 4551 State or territory Queensland (QLD) Region Sunshine Coast Add a free Meridan Plains business listing Be the first listing in Meridan Plains Common questionsWhat is the postcode for Meridan Plains?Meridan Plains, QLD has the postcode 4551.What state is Meridan Plains in?Meridan Plains is in Queensland (QLD).Does postcode 4551 cover more than one suburb?Yes. Postcode 4551 covers 14 localities, so the postcode alone does not identify Meridan Plains. Browse other postcodes in Queensland, or widen the search to every Australian postcode.