guildford postcode wa Home ›› Postcode Finder ›› WA ›› Guildford Guildford local listingsThe suburb of Guildford is located in WA and has a postcode of 6055. Free guildford business listing! 1Guildford Grammar School11 Terrace Rd 08 937792222Guildford Primary School125 Helena St 08 93773255 View more business listings in guildford Search and find other Postcodes in Western Australia or widen the search to Postcodes in Australia.