Home Postcode finder WA Harris River Harris River postcode WA Harris River is a locality in Western Australia covered by postcode 6225. Postcode 6225 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Harris River business listing Be the first listing in Harris River Common questionsWhat is the postcode for Harris River?Harris River, WA has the postcode 6225.What state is Harris River in?Harris River is in Western Australia (WA).Does postcode 6225 cover more than one suburb?Yes. Postcode 6225 covers 18 localities, so the postcode alone does not identify Harris River. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.