Home Postcode finder NSW Galston Galston postcode NSW Galston is a locality in New South Wales covered by postcode 2159. Postcode 2159 State or territory New South Wales (NSW) Region Seven Hills Add a free Galston business listing More business listings in Galston Businesses in GalstonFlora And Fauna9 Crusader Road · 0497 000449Galston High School403 Galston Rd · 02 96512222Galston Public SchoolArcadia Rd · 02 96532062 Common questionsWhat is the postcode for Galston?Galston, NSW has the postcode 2159.What state is Galston in?Galston is in New South Wales (NSW).Does postcode 2159 cover more than one suburb?Yes. Postcode 2159 covers 4 localities, so the postcode alone does not identify Galston. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.