Home Postcode finder WA Wickham Wickham postcode WA Wickham is a locality in Western Australia covered by postcode 6720. Postcode 6720 State or territory Western Australia (WA) Region North West Suburbs Add a free Wickham business listing More business listings in Wickham Businesses in WickhamWickham Primary SchoolOleander Place · 08 91871089 Common questionsWhat is the postcode for Wickham?Wickham, WA has the postcode 6720.What state is Wickham in?Wickham is in Western Australia (WA).Does postcode 6720 cover more than one suburb?Yes. Postcode 6720 covers 3 localities, so the postcode alone does not identify Wickham. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.