Home Postcode finder SA Inman Valley Inman Valley postcode SA Inman Valley is a locality in South Australia covered by postcode 5211. Postcode 5211 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Inman Valley business listing Be the first listing in Inman Valley Common questionsWhat is the postcode for Inman Valley?Inman Valley, SA has the postcode 5211.What state is Inman Valley in?Inman Valley is in South Australia (SA).Does postcode 5211 cover more than one suburb?Yes. Postcode 5211 covers 12 localities, so the postcode alone does not identify Inman Valley. Browse other postcodes in South Australia, or widen the search to every Australian postcode.