Home Postcode finder SA Penwortham Penwortham postcode SA Penwortham is a locality in South Australia covered by postcode 5453. Postcode 5453 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Penwortham business listing Be the first listing in Penwortham Common questionsWhat is the postcode for Penwortham?Penwortham, SA has the postcode 5453.What state is Penwortham in?Penwortham is in South Australia (SA).Does postcode 5453 cover more than one suburb?Yes. Postcode 5453 covers 16 localities, so the postcode alone does not identify Penwortham. Browse other postcodes in South Australia, or widen the search to every Australian postcode.