Home Postcode finder WA Wyalkatchem Wyalkatchem postcode WA Wyalkatchem is a locality in Western Australia covered by postcode 6485. Postcode 6485 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Wyalkatchem business listing More business listings in Wyalkatchem Businesses in WyalkatchemWyalkatchem District High SchoolHonour Ave · 08 96811010 Common questionsWhat is the postcode for Wyalkatchem?Wyalkatchem, WA has the postcode 6485.What state is Wyalkatchem in?Wyalkatchem is in Western Australia (WA).Does postcode 6485 cover more than one suburb?Yes. Postcode 6485 covers 5 localities, so the postcode alone does not identify Wyalkatchem. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.