Home Postcode finder NSW Middle Arm Middle Arm postcode NSW Middle Arm is a locality in New South Wales covered by postcode 2580. Postcode 2580 State or territory New South Wales (NSW) Region Canberra Add a free Middle Arm business listing Be the first listing in Middle Arm Common questionsWhat is the postcode for Middle Arm?Middle Arm, NSW has the postcode 2580.What state is Middle Arm in?Middle Arm is in New South Wales (NSW).Does postcode 2580 cover more than one suburb?Yes. Postcode 2580 covers 44 localities, so the postcode alone does not identify Middle Arm. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.