Home Postcode finder QLD Leichhardt Leichhardt postcode QLD Leichhardt is a locality in Queensland covered by postcode 4305. Postcode 4305 State or territory Queensland (QLD) Region Western Suburbs Add a free Leichhardt business listing More business listings in Leichhardt Businesses in LeichhardtImmaculate Heart Primary School24 Old Toowoomba Rd · 07 38121077Leichhardt State School72 Samford Rd · 07 38133222 Common questionsWhat is the postcode for Leichhardt?Leichhardt, QLD has the postcode 4305.What state is Leichhardt in?Leichhardt is in Queensland (QLD).Does postcode 4305 cover more than one suburb?Yes. Postcode 4305 covers 23 localities, so the postcode alone does not identify Leichhardt. Browse other postcodes in Queensland, or widen the search to every Australian postcode.