Home Postcode finder SA Hynam Hynam postcode SA Hynam is a locality in South Australia covered by postcode 5262. Postcode 5262 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Hynam business listing Be the first listing in Hynam Common questionsWhat is the postcode for Hynam?Hynam, SA has the postcode 5262.What state is Hynam in?Hynam is in South Australia (SA).Does postcode 5262 cover more than one suburb?Yes. Postcode 5262 covers 4 localities, so the postcode alone does not identify Hynam. Browse other postcodes in South Australia, or widen the search to every Australian postcode.