Home Postcode finder NSW Yarrow Yarrow postcode NSW Yarrow is a locality in New South Wales covered by postcode 2620. Postcode 2620 State or territory New South Wales (NSW) Region Canberra Add a free Yarrow business listing Be the first listing in Yarrow Common questionsWhat is the postcode for Yarrow?Yarrow, NSW has the postcode 2620.What state is Yarrow in?Yarrow is in New South Wales (NSW).Does postcode 2620 cover more than one suburb?Yes. Postcode 2620 covers 29 localities, so the postcode alone does not identify Yarrow. It also appears in 2 states or territories, so it does not identify a state either. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.