Home Postcode finder SA Whyalla Jenkins Whyalla Jenkins postcode SA Whyalla Jenkins is a locality in South Australia covered by postcode 5609. Postcode 5609 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Whyalla Jenkins business listing Be the first listing in Whyalla Jenkins Common questionsWhat is the postcode for Whyalla Jenkins?Whyalla Jenkins, SA has the postcode 5609.What state is Whyalla Jenkins in?Whyalla Jenkins is in South Australia (SA).Does postcode 5609 cover more than one suburb?No. Postcode 5609 covers Whyalla Jenkins only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in South Australia, or widen the search to every Australian postcode.