Home Postcode finder QLD Mount Colliery Mount Colliery postcode QLD Mount Colliery is a locality in Queensland covered by postcode 4370. Postcode 4370 State or territory Queensland (QLD) Region Toowoomba Region Add a free Mount Colliery business listing Be the first listing in Mount Colliery Common questionsWhat is the postcode for Mount Colliery?Mount Colliery, QLD has the postcode 4370.What state is Mount Colliery in?Mount Colliery is in Queensland (QLD).Does postcode 4370 cover more than one suburb?Yes. Postcode 4370 covers 46 localities, so the postcode alone does not identify Mount Colliery. Browse other postcodes in Queensland, or widen the search to every Australian postcode.