Home Postcode finder QLD St Ruth St Ruth postcode QLD St Ruth is a locality in Queensland covered by postcode 4405. Postcode 4405 State or territory Queensland (QLD) Region Toowoomba Region Add a free St Ruth business listing Be the first listing in St Ruth Common questionsWhat is the postcode for St Ruth?St Ruth, QLD has the postcode 4405.What state is St Ruth in?St Ruth is in Queensland (QLD).Does postcode 4405 cover more than one suburb?Yes. Postcode 4405 covers 11 localities, so the postcode alone does not identify St Ruth. Browse other postcodes in Queensland, or widen the search to every Australian postcode.