willetton postcode wa Home ›› Postcode Finder ›› WA ›› Willetton Willetton local listingsThe suburb of Willetton is located in WA and has a postcode of 6155. Free willetton business listing! 1Castlereagh School21 Castlereagh Cl 08 933230002Willetton Senior High School120 Pinetree Gully Rd 08 933472003Woodthorpe School8 Woodthorpe Dr 08 62502000 View more business listings in willetton Search and find other Postcodes in Western Australia or widen the search to Postcodes in Australia.