Home Postcode finder QLD Clifford Clifford postcode QLD Clifford is a locality in Queensland covered by postcode 4427. Postcode 4427 State or territory Queensland (QLD) Region Toowoomba Region Add a free Clifford business listing Be the first listing in Clifford Common questionsWhat is the postcode for Clifford?Clifford, QLD has the postcode 4427.What state is Clifford in?Clifford is in Queensland (QLD).Does postcode 4427 cover more than one suburb?Yes. Postcode 4427 covers 4 localities, so the postcode alone does not identify Clifford. Browse other postcodes in Queensland, or widen the search to every Australian postcode.