merriwa postcode wa Home ›› Postcode Finder ›› WA ›› Merriwa Merriwa local listingsThe suburb of Merriwa is located in WA and has a postcode of 6030. Free merriwa business listing! 1Merriwa Education Support CentreBaltimore Parade 08 930598972Merriwa Primary SchoolBaltimore Parade 08 930590113Catalyst School26 Jenolan Way 08 61023626 View more business listings in merriwa Search and find other Postcodes in Western Australia or widen the search to Postcodes in Australia.