Home Postcode finder QLD Rossvale Rossvale postcode QLD Rossvale is a locality in Queensland covered by postcode 4356. Postcode 4356 State or territory Queensland (QLD) Region Toowoomba Region Add a free Rossvale business listing Be the first listing in Rossvale Common questionsWhat is the postcode for Rossvale?Rossvale, QLD has the postcode 4356.What state is Rossvale in?Rossvale is in Queensland (QLD).Does postcode 4356 cover more than one suburb?Yes. Postcode 4356 covers 18 localities, so the postcode alone does not identify Rossvale. Browse other postcodes in Queensland, or widen the search to every Australian postcode.