Home Postcode finder SA St Peters St Peters postcode SA St Peters is a locality in South Australia covered by postcode 5069. Postcode 5069 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free St Peters business listing More business listings in St Peters Businesses in St PetersBanners And Mash Pty LtdUnit 4 · 0881322888East Adelaide Junior Primary School57-59 Second Ave · 08 83621622East Adelaide Primary School57-59 Second Ave · 08 83621622 Common questionsWhat is the postcode for St Peters?St Peters, SA has the postcode 5069.What state is St Peters in?St Peters is in South Australia (SA).Does postcode 5069 cover more than one suburb?Yes. Postcode 5069 covers 6 localities, so the postcode alone does not identify St Peters. Browse other postcodes in South Australia, or widen the search to every Australian postcode.