mount-barker-junction postcode sa Home ›› Postcode Finder ›› SA ›› Mount-Barker-Junction Mount Barker Junction local listingsThe suburb of Mount Barker Junction is located in SA and has a postcode of 5251. Free mount barker junction business listing! Get the first free listing in mount barker junction! Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.