Home Postcode finder QLD Humeburn Humeburn postcode QLD Humeburn is a locality in Queensland covered by postcode 4490. Postcode 4490 State or territory Queensland (QLD) Region Toowoomba Region Add a free Humeburn business listing Be the first listing in Humeburn Common questionsWhat is the postcode for Humeburn?Humeburn, QLD has the postcode 4490.What state is Humeburn in?Humeburn is in Queensland (QLD).Does postcode 4490 cover more than one suburb?Yes. Postcode 4490 covers 11 localities, so the postcode alone does not identify Humeburn. Browse other postcodes in Queensland, or widen the search to every Australian postcode.