merriwa postcode nsw Home ›› Postcode Finder ›› NSW ›› Merriwa Merriwa local listingsThe suburb of Merriwa is located in NSW and has a postcode of 2329. Free merriwa business listing! 1Merriwa Central SchoolBow St 02 654821192St Joseph's SchoolMarquet St 02 65482035 View more business listings in merriwa Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.