blackwood postcode sa Home ›› Postcode Finder ›› SA ›› Blackwood Blackwood local listingsThe suburb of Blackwood is located in SA and has a postcode of 5051. Free blackwood business listing! 1St Peter's Lutheran School71 Cumming St 08 827895062Hills And Valley Real Estate Pty Ltd1 200 Main road 08 8278 42223Secure CashPO Box 215 1300 364 569 View more business listings in blackwood Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.