Home Postcode finder NSW Rouse Hill Rouse Hill postcode NSW Rouse Hill is a locality in New South Wales covered by postcode 2155. Postcode 2155 State or territory New South Wales (NSW) Region Seven Hills Add a free Rouse Hill business listing Be the first listing in Rouse Hill Common questionsWhat is the postcode for Rouse Hill?Rouse Hill, NSW has the postcode 2155.What state is Rouse Hill in?Rouse Hill is in New South Wales (NSW).Does postcode 2155 cover more than one suburb?Yes. Postcode 2155 covers 4 localities, so the postcode alone does not identify Rouse Hill. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.