Home Postcode finder SA Deepwater Deepwater postcode SA Deepwater is a locality in South Australia covered by postcode 5266. Postcode 5266 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Deepwater business listing Be the first listing in Deepwater Common questionsWhat is the postcode for Deepwater?Deepwater, SA has the postcode 5266.What state is Deepwater in?Deepwater is in South Australia (SA).Does postcode 5266 cover more than one suburb?Yes. Postcode 5266 covers 4 localities, so the postcode alone does not identify Deepwater. Browse other postcodes in South Australia, or widen the search to every Australian postcode.