summertown postcode sa Home ›› Postcode Finder ›› SA ›› Summertown Summertown local listingsThe suburb of Summertown is located in SA and has a postcode of 5141. Free summertown business listing! 1Landini Central - Summertown1069 Greenhill Road (08) 8139 7222 View more business listings in summertown Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.