Home Postcode finder SA Summertown Summertown postcode SA Summertown is a locality in South Australia covered by postcode 5141. Postcode 5141 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Summertown business listing More business listings in Summertown Businesses in SummertownLandini Central - Summertown1069 Greenhill Road · (08) 8139 7222 Common questionsWhat is the postcode for Summertown?Summertown, SA has the postcode 5141.What state is Summertown in?Summertown is in South Australia (SA).Does postcode 5141 cover more than one suburb?Yes. Postcode 5141 covers 2 localities, so the postcode alone does not identify Summertown. Browse other postcodes in South Australia, or widen the search to every Australian postcode.