Home Postcode finder QLD Speedwell Speedwell postcode QLD Speedwell is a locality in Queensland covered by postcode 4613. Postcode 4613 State or territory Queensland (QLD) Region Toowoomba Region Add a free Speedwell business listing Be the first listing in Speedwell Common questionsWhat is the postcode for Speedwell?Speedwell, QLD has the postcode 4613.What state is Speedwell in?Speedwell is in Queensland (QLD).Does postcode 4613 cover more than one suburb?Yes. Postcode 4613 covers 10 localities, so the postcode alone does not identify Speedwell. Browse other postcodes in Queensland, or widen the search to every Australian postcode.