Home Postcode finder QLD Ernestina Ernestina postcode QLD Ernestina is a locality in Queensland covered by postcode 4730. Postcode 4730 State or territory Queensland (QLD) Region Central QLD Add a free Ernestina business listing Be the first listing in Ernestina Common questionsWhat is the postcode for Ernestina?Ernestina, QLD has the postcode 4730.What state is Ernestina in?Ernestina is in Queensland (QLD).Does postcode 4730 cover more than one suburb?Yes. Postcode 4730 covers 9 localities, so the postcode alone does not identify Ernestina. Browse other postcodes in Queensland, or widen the search to every Australian postcode.