Home Postcode finder QLD Caloundra Caloundra postcode QLD Caloundra is a locality in Queensland covered by postcode 4551. Postcode 4551 State or territory Queensland (QLD) Region Sunshine Coast Add a free Caloundra business listing More business listings in Caloundra Businesses in CaloundraAccurate Psychic Readings OnlinePO Box 1314 · 61+ 401958711Affordable Removals25b Latcham Drive · 07 5327 3037A-K Earthmoving Group Pty Ltd124 Bulcock Street, Caloundra QLD, Australia · 0406696575 Common questionsWhat is the postcode for Caloundra?Caloundra, QLD has the postcode 4551.What state is Caloundra in?Caloundra is in Queensland (QLD).Does postcode 4551 cover more than one suburb?Yes. Postcode 4551 covers 14 localities, so the postcode alone does not identify Caloundra. Browse other postcodes in Queensland, or widen the search to every Australian postcode.