Home Postcode finder QLD Hamilton Plains Hamilton Plains postcode QLD Hamilton Plains is a locality in Queensland covered by postcode 4800. Postcode 4800 State or territory Queensland (QLD) Region Central QLD Add a free Hamilton Plains business listing Be the first listing in Hamilton Plains Common questionsWhat is the postcode for Hamilton Plains?Hamilton Plains, QLD has the postcode 4800.What state is Hamilton Plains in?Hamilton Plains 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 Hamilton Plains. Browse other postcodes in Queensland, or widen the search to every Australian postcode.