Home Postcode finder SA Wallaroo Wallaroo postcode SA Wallaroo is a locality in South Australia covered by postcode 5556. Postcode 5556 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Wallaroo business listing More business listings in Wallaroo Businesses in WallarooKalori Catholic School6 Young St · 08 88232549Wallaroo Primary SchoolHughs St · 08 88232190 Common questionsWhat is the postcode for Wallaroo?Wallaroo, SA has the postcode 5556.What state is Wallaroo in?Wallaroo is in South Australia (SA).Does postcode 5556 cover more than one suburb?Yes. Postcode 5556 covers 4 localities, so the postcode alone does not identify Wallaroo. Browse other postcodes in South Australia, or widen the search to every Australian postcode.