Home Postcode finder QLD Northlands Northlands postcode QLD Northlands is a locality in Queensland covered by postcode 4350. Postcode 4350 State or territory Queensland (QLD) Region Toowoomba Region Add a free Northlands business listing Be the first listing in Northlands Common questionsWhat is the postcode for Northlands?Northlands, QLD has the postcode 4350.What state is Northlands in?Northlands is in Queensland (QLD).Does postcode 4350 cover more than one suburb?Yes. Postcode 4350 covers 43 localities, so the postcode alone does not identify Northlands. Browse other postcodes in Queensland, or widen the search to every Australian postcode.