Home Postcode finder WA Winthrop Winthrop postcode WA Winthrop is a locality in Western Australia covered by postcode 6150. Postcode 6150 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Winthrop business listing More business listings in Winthrop Businesses in WinthropWinthrop Primary School70-80 Jackson Ave · 08 93106100Winthrop Village Dental CentreVillage, shop 22/131 Somerville Blvd, Winthrop WA, Australia · (08) 9312 1388 Common questionsWhat is the postcode for Winthrop?Winthrop, WA has the postcode 6150.What state is Winthrop in?Winthrop is in Western Australia (WA).Does postcode 6150 cover more than one suburb?Yes. Postcode 6150 covers 3 localities, so the postcode alone does not identify Winthrop. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.