Home Postcode finder QLD Norwin Norwin postcode QLD Norwin is a locality in Queensland covered by postcode 4356. Postcode 4356 State or territory Queensland (QLD) Region Toowoomba Region Add a free Norwin business listing Be the first listing in Norwin Common questionsWhat is the postcode for Norwin?Norwin, QLD has the postcode 4356.What state is Norwin in?Norwin is in Queensland (QLD).Does postcode 4356 cover more than one suburb?Yes. Postcode 4356 covers 18 localities, so the postcode alone does not identify Norwin. Browse other postcodes in Queensland, or widen the search to every Australian postcode.