peterborough postcode sa Home ›› Postcode Finder ›› SA ›› Peterborough Peterborough local listingsThe suburb of Peterborough is located in SA and has a postcode of 5422. Free peterborough business listing! 1Peterborough High School60-78 Queen St 08 865123062Peterborough Primary School75 Bridges St 08 865121023St Joseph's School2 Bourke St 08 86512449 View more business listings in peterborough Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.