Home Postcode finder QLD Merlwood Merlwood postcode QLD Merlwood is a locality in Queensland covered by postcode 4605. Postcode 4605 State or territory Queensland (QLD) Region Toowoomba Region Add a free Merlwood business listing Be the first listing in Merlwood Common questionsWhat is the postcode for Merlwood?Merlwood, QLD has the postcode 4605.What state is Merlwood in?Merlwood is in Queensland (QLD).Does postcode 4605 cover more than one suburb?Yes. Postcode 4605 covers 21 localities, so the postcode alone does not identify Merlwood. Browse other postcodes in Queensland, or widen the search to every Australian postcode.