Home Postcode finder QLD Darling Heights Darling Heights postcode QLD Darling Heights is a locality in Queensland covered by postcode 4350. Postcode 4350 State or territory Queensland (QLD) Region Toowoomba Region Add a free Darling Heights business listing Be the first listing in Darling Heights Common questionsWhat is the postcode for Darling Heights?Darling Heights, QLD has the postcode 4350.What state is Darling Heights in?Darling Heights 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 Darling Heights. Browse other postcodes in Queensland, or widen the search to every Australian postcode.