Home Postcode finder QLD Willowvale Willowvale postcode QLD Willowvale is a locality in Queensland covered by postcode 4370. Postcode 4370 State or territory Queensland (QLD) Region Toowoomba Region Add a free Willowvale business listing Be the first listing in Willowvale Common questionsWhat is the postcode for Willowvale?Willowvale, QLD has the postcode 4370.What state is Willowvale in?Willowvale is in Queensland (QLD).Does postcode 4370 cover more than one suburb?Yes. Postcode 4370 covers 46 localities, so the postcode alone does not identify Willowvale. Browse other postcodes in Queensland, or widen the search to every Australian postcode.