Home Postcode finder WA Merriwa Merriwa postcode WA Merriwa is a locality in Western Australia covered by postcode 6030. Postcode 6030 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Merriwa business listing More business listings in Merriwa Businesses in MerriwaCatalyst School26 Jenolan Way · 08 61023626Merriwa Education Support CentreBaltimore Parade · 08 93059897Merriwa Primary SchoolBaltimore Parade · 08 93059011 Common questionsWhat is the postcode for Merriwa?Merriwa, WA has the postcode 6030.What state is Merriwa in?Merriwa is in Western Australia (WA).Does postcode 6030 cover more than one suburb?Yes. Postcode 6030 covers 6 localities, so the postcode alone does not identify Merriwa. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.