Home Postcode finder QLD Boompa Boompa postcode QLD Boompa is a locality in Queensland covered by postcode 4621. Postcode 4621 State or territory Queensland (QLD) Region Sunshine Coast Add a free Boompa business listing Be the first listing in Boompa Common questionsWhat is the postcode for Boompa?Boompa, QLD has the postcode 4621.What state is Boompa in?Boompa is in Queensland (QLD).Does postcode 4621 cover more than one suburb?Yes. Postcode 4621 covers 11 localities, so the postcode alone does not identify Boompa. Browse other postcodes in Queensland, or widen the search to every Australian postcode.