Home Postcode finder QLD Weir River Weir River postcode QLD Weir River is a locality in Queensland covered by postcode 4406. Postcode 4406 State or territory Queensland (QLD) Region Toowoomba Region Add a free Weir River business listing Be the first listing in Weir River Common questionsWhat is the postcode for Weir River?Weir River, QLD has the postcode 4406.What state is Weir River in?Weir River is in Queensland (QLD).Does postcode 4406 cover more than one suburb?Yes. Postcode 4406 covers 10 localities, so the postcode alone does not identify Weir River. Browse other postcodes in Queensland, or widen the search to every Australian postcode.