Home Postcode finder SA Windsor Windsor postcode SA Windsor is a locality in South Australia covered by postcode 5501. Postcode 5501 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Windsor business listing Be the first listing in Windsor Common questionsWhat is the postcode for Windsor?Windsor, SA has the postcode 5501.What state is Windsor in?Windsor is in South Australia (SA).Does postcode 5501 cover more than one suburb?Yes. Postcode 5501 covers 14 localities, so the postcode alone does not identify Windsor. Browse other postcodes in South Australia, or widen the search to every Australian postcode.