Home Postcode finder SA Sandy Grove Sandy Grove postcode SA Sandy Grove is a locality in South Australia covered by postcode 5275. Postcode 5275 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Sandy Grove business listing Be the first listing in Sandy Grove Common questionsWhat is the postcode for Sandy Grove?Sandy Grove, SA has the postcode 5275.What state is Sandy Grove in?Sandy Grove is in South Australia (SA).Does postcode 5275 cover more than one suburb?Yes. Postcode 5275 covers 15 localities, so the postcode alone does not identify Sandy Grove. Browse other postcodes in South Australia, or widen the search to every Australian postcode.