Home Postcode finder QLD Helidon Helidon postcode QLD Helidon is a locality in Queensland covered by postcode 4344. Postcode 4344 State or territory Queensland (QLD) Region Western Suburbs Add a free Helidon business listing More business listings in Helidon Businesses in HelidonHelidon State School16 School St · 07 46129222 Common questionsWhat is the postcode for Helidon?Helidon, QLD has the postcode 4344.What state is Helidon in?Helidon is in Queensland (QLD).Does postcode 4344 cover more than one suburb?Yes. Postcode 4344 covers 12 localities, so the postcode alone does not identify Helidon. Browse other postcodes in Queensland, or widen the search to every Australian postcode.