Home Postcode finder QLD Thornton Thornton postcode QLD Thornton is a locality in Queensland covered by postcode 4341. Postcode 4341 State or territory Queensland (QLD) Region Western Suburbs Add a free Thornton business listing More business listings in Thornton Businesses in ThorntonThornton State School4 Thornton School Rd · 07 54667141 Common questionsWhat is the postcode for Thornton?Thornton, QLD has the postcode 4341.What state is Thornton in?Thornton is in Queensland (QLD).Does postcode 4341 cover more than one suburb?Yes. Postcode 4341 covers 16 localities, so the postcode alone does not identify Thornton. Browse other postcodes in Queensland, or widen the search to every Australian postcode.