Home Postcode finder QLD Linden Linden postcode QLD Linden is a locality in Queensland covered by postcode 4490. Postcode 4490 State or territory Queensland (QLD) Region Toowoomba Region Add a free Linden business listing Be the first listing in Linden Common questionsWhat is the postcode for Linden?Linden, QLD has the postcode 4490.What state is Linden in?Linden 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 Linden. Browse other postcodes in Queensland, or widen the search to every Australian postcode.