Home Postcode finder WA Merredin Merredin postcode WA Merredin is a locality in Western Australia covered by postcode 6415. Postcode 6415 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Merredin business listing More business listings in Merredin Businesses in MerredinMerredin Senior High SchoolWoolgar Ave · 08 90410900North Merredin Primary School22 Coronation St · 08 90411140South Merredin Primary SchoolCaw St · 08 90411368 Common questionsWhat is the postcode for Merredin?Merredin, WA has the postcode 6415.What state is Merredin in?Merredin is in Western Australia (WA).Does postcode 6415 cover more than one suburb?Yes. Postcode 6415 covers 6 localities, so the postcode alone does not identify Merredin. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.