high-wycombe postcode wa Home ›› Postcode Finder ›› WA ›› High-Wycombe High Wycombe local listingsThe suburb of High Wycombe is located in WA and has a postcode of 6057. Free high wycombe business listing! Get the first free listing in high wycombe! Search and find other Postcodes in Western Australia or widen the search to Postcodes in Australia.