Home Postcode finder NSW Cumnock Cumnock postcode NSW Cumnock is a locality in New South Wales covered by postcode 2867. Postcode 2867 State or territory New South Wales (NSW) Region NSW Country West Add a free Cumnock business listing More business listings in Cumnock Businesses in CumnockCumnock Public SchoolRailway Pde · 02 63677207 Common questionsWhat is the postcode for Cumnock?Cumnock, NSW has the postcode 2867.What state is Cumnock in?Cumnock is in New South Wales (NSW).Does postcode 2867 cover more than one suburb?Yes. Postcode 2867 covers 5 localities, so the postcode alone does not identify Cumnock. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.