dismal-swamp postcode sa Home ›› Postcode Finder ›› SA ›› Dismal-Swamp Dismal Swamp local listingsThe suburb of Dismal Swamp is located in SA and has a postcode of 5291. Free dismal swamp business listing! Get the first free listing in dismal swamp! Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.