lewiston postcode sa Home ›› Postcode Finder ›› SA ›› Lewiston Lewiston local listingsThe suburb of Lewiston is located in SA and has a postcode of 5501. Free lewiston business listing! 1Jim's Fencing Adelaide PlainsLewiston SA, Australia 131546 View more business listings in lewiston Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.