Home Postcode finder SA Wyomi Wyomi postcode SA Wyomi 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 Wyomi business listing Be the first listing in Wyomi Common questionsWhat is the postcode for Wyomi?Wyomi, SA has the postcode 5275.What state is Wyomi in?Wyomi 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 Wyomi. Browse other postcodes in South Australia, or widen the search to every Australian postcode.