Home Postcode finder QLD Smithlea Smithlea postcode QLD Smithlea is a locality in Queensland covered by postcode 4385. Postcode 4385 State or territory Queensland (QLD) Region Toowoomba Region Add a free Smithlea business listing Be the first listing in Smithlea Common questionsWhat is the postcode for Smithlea?Smithlea, QLD has the postcode 4385.What state is Smithlea in?Smithlea is in Queensland (QLD).Does postcode 4385 cover more than one suburb?Yes. Postcode 4385 covers 10 localities, so the postcode alone does not identify Smithlea. It also appears in 2 states or territories, so it does not identify a state either. Browse other postcodes in Queensland, or widen the search to every Australian postcode.