wickham postcode wa Home ›› Postcode Finder ›› WA ›› Wickham Wickham local listingsThe suburb of Wickham is located in WA and has a postcode of 6720. Free wickham business listing! 1Wickham Primary SchoolOleander Place 08 91871089 View more business listings in wickham Search and find other Postcodes in Western Australia or widen the search to Postcodes in Australia.