Home Postcode finder QLD East Trinity East Trinity postcode QLD East Trinity is a locality in Queensland covered by postcode 4871. Postcode 4871 State or territory Queensland (QLD) Region North QLD Add a free East Trinity business listing Be the first listing in East Trinity Common questionsWhat is the postcode for East Trinity?East Trinity, QLD has the postcode 4871.What state is East Trinity in?East Trinity is in Queensland (QLD).Does postcode 4871 cover more than one suburb?Yes. Postcode 4871 covers 103 localities, so the postcode alone does not identify East Trinity. Browse other postcodes in Queensland, or widen the search to every Australian postcode.