Home Postcode finder QLD Preston Preston postcode QLD Preston is a locality in Queensland covered by postcode 4800. Postcode 4800 State or territory Queensland (QLD) Region Central QLD Add a free Preston business listing Be the first listing in Preston Common questionsWhat is the postcode for Preston?Preston, QLD has the postcode 4800.What state is Preston in?Preston is in Queensland (QLD).Does postcode 4800 cover more than one suburb?Yes. Postcode 4800 covers 38 localities, so the postcode alone does not identify Preston. Browse other postcodes in Queensland, or widen the search to every Australian postcode.