helidon postcode qldga Home ›› Postcode Finder ›› QLDGA ›› Helidon Helidon local listingsThe suburb of Helidon is located in QLD and has a postcode of 4344. Free helidon business listing! 1Helidon State School16 School St 07 46129222 View more business listings in helidon Search and find other Postcodes in Queensland or widen the search to Postcodes in Australia.