macdonald-park postcode sa Home ›› Postcode Finder ›› SA ›› Macdonald-Park Macdonald Park local listingsThe suburb of Macdonald Park is located in SA and has a postcode of 5121. Free macdonald park business listing! Get the first free listing in macdonald park! Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.