Home Postcode finder QLD Tuen Tuen postcode QLD Tuen is a locality in Queensland covered by postcode 4490. Postcode 4490 State or territory Queensland (QLD) Region Toowoomba Region Add a free Tuen business listing Be the first listing in Tuen Common questionsWhat is the postcode for Tuen?Tuen, QLD has the postcode 4490.What state is Tuen in?Tuen is in Queensland (QLD).Does postcode 4490 cover more than one suburb?Yes. Postcode 4490 covers 11 localities, so the postcode alone does not identify Tuen. Browse other postcodes in Queensland, or widen the search to every Australian postcode.