Home Postcode finder QLD Irvingdale Irvingdale postcode QLD Irvingdale is a locality in Queensland covered by postcode 4404. Postcode 4404 State or territory Queensland (QLD) Region Toowoomba Region Add a free Irvingdale business listing Be the first listing in Irvingdale Common questionsWhat is the postcode for Irvingdale?Irvingdale, QLD has the postcode 4404.What state is Irvingdale in?Irvingdale is in Queensland (QLD).Does postcode 4404 cover more than one suburb?Yes. Postcode 4404 covers 4 localities, so the postcode alone does not identify Irvingdale. Browse other postcodes in Queensland, or widen the search to every Australian postcode.