Home Postcode finder QLD Leslie Leslie postcode QLD Leslie is a locality in Queensland covered by postcode 4370. Postcode 4370 State or territory Queensland (QLD) Region Toowoomba Region Add a free Leslie business listing Be the first listing in Leslie Common questionsWhat is the postcode for Leslie?Leslie, QLD has the postcode 4370.What state is Leslie in?Leslie 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 Leslie. Browse other postcodes in Queensland, or widen the search to every Australian postcode.