Home Postcode finder QLD Simmie Simmie postcode QLD Simmie is a locality in Queensland covered by postcode 4454. Postcode 4454 State or territory Queensland (QLD) Region Toowoomba Region Add a free Simmie business listing Be the first listing in Simmie Common questionsWhat is the postcode for Simmie?Simmie, QLD has the postcode 4454.What state is Simmie in?Simmie is in Queensland (QLD).Does postcode 4454 cover more than one suburb?Yes. Postcode 4454 covers 11 localities, so the postcode alone does not identify Simmie. Browse other postcodes in Queensland, or widen the search to every Australian postcode.