Home Postcode finder QLD Marshlands Marshlands postcode QLD Marshlands is a locality in Queensland covered by postcode 4611. Postcode 4611 State or territory Queensland (QLD) Region Toowoomba Region Add a free Marshlands business listing Be the first listing in Marshlands Common questionsWhat is the postcode for Marshlands?Marshlands, QLD has the postcode 4611.What state is Marshlands in?Marshlands is in Queensland (QLD).Does postcode 4611 cover more than one suburb?Yes. Postcode 4611 covers 2 localities, so the postcode alone does not identify Marshlands. Browse other postcodes in Queensland, or widen the search to every Australian postcode.