Home Postcode finder QLD St Helens Beach St Helens Beach postcode QLD St Helens Beach is a locality in Queensland covered by postcode 4798. Postcode 4798 State or territory Queensland (QLD) Region Central QLD Add a free St Helens Beach business listing Be the first listing in St Helens Beach Common questionsWhat is the postcode for St Helens Beach?St Helens Beach, QLD has the postcode 4798.What state is St Helens Beach in?St Helens Beach is in Queensland (QLD).Does postcode 4798 cover more than one suburb?Yes. Postcode 4798 covers 4 localities, so the postcode alone does not identify St Helens Beach. Browse other postcodes in Queensland, or widen the search to every Australian postcode.