Home Postcode finder NSW Rossmore Rossmore postcode NSW Rossmore is a locality in New South Wales covered by postcode 2557. Postcode 2557 State or territory New South Wales (NSW) Region Ingleburn Add a free Rossmore business listing More business listings in Rossmore Businesses in RossmoreNutek Mechanical770 Bringelly Road, Rossmore NSW, Australia · 02 96067720Nutek Mechanical770 Bringelly Road, Rossmore NSW 2557, Australia · 02 9606 7720Wisdom Plumbing5 Wynyard Avenue · 0424939392 Common questionsWhat is the postcode for Rossmore?Rossmore, NSW has the postcode 2557.What state is Rossmore in?Rossmore is in New South Wales (NSW).Does postcode 2557 cover more than one suburb?Yes. Postcode 2557 covers 3 localities, so the postcode alone does not identify Rossmore. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.