cascade postcode wa Home ›› Postcode Finder ›› WA ›› Cascade Cascade local listingsThe suburb of Cascade is located in WA and has a postcode of 6450. Free cascade business listing! 1Cascade Primary SchoolLot 50 Asha Court 08 90792061 View more business listings in cascade Search and find other Postcodes in Western Australia or widen the search to Postcodes in Australia.