Home Postcode finder QLD Southwood Southwood postcode QLD Southwood is a locality in Queensland covered by postcode 4406. Postcode 4406 State or territory Queensland (QLD) Region Toowoomba Region Add a free Southwood business listing Be the first listing in Southwood Common questionsWhat is the postcode for Southwood?Southwood, QLD has the postcode 4406.What state is Southwood in?Southwood 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 Southwood. Browse other postcodes in Queensland, or widen the search to every Australian postcode.