Home Postcode finder QLD Kilbirnie Kilbirnie postcode QLD Kilbirnie is a locality in Queensland covered by postcode 4354. Postcode 4354 State or territory Queensland (QLD) Region Toowoomba Region Add a free Kilbirnie business listing Be the first listing in Kilbirnie Common questionsWhat is the postcode for Kilbirnie?Kilbirnie, QLD has the postcode 4354.What state is Kilbirnie in?Kilbirnie is in Queensland (QLD).Does postcode 4354 cover more than one suburb?Yes. Postcode 4354 covers 3 localities, so the postcode alone does not identify Kilbirnie. Browse other postcodes in Queensland, or widen the search to every Australian postcode.