Home Postcode finder QLD Grandchester Grandchester postcode QLD Grandchester is a locality in Queensland covered by postcode 4340. Postcode 4340 State or territory Queensland (QLD) Region Western Suburbs Add a free Grandchester business listing More business listings in Grandchester Businesses in GrandchesterGrandchester State SchoolSchool Rd · 07 54655261grandchesterheritagechickens256 Bakers Road, Grandchester Queensland 4340, Australia · 0401345562Spicers Hidden Vale617 Grandchester Mount Mort Rd · 1300 179 340 Common questionsWhat is the postcode for Grandchester?Grandchester, QLD has the postcode 4340.What state is Grandchester in?Grandchester is in Queensland (QLD).Does postcode 4340 cover more than one suburb?Yes. Postcode 4340 covers 18 localities, so the postcode alone does not identify Grandchester. Browse other postcodes in Queensland, or widen the search to every Australian postcode.