Home Postcode finder NSW Chinnock Chinnock postcode NSW Chinnock is a locality in New South Wales covered by postcode 2550. Postcode 2550 State or territory New South Wales (NSW) Region NSW Country West Add a free Chinnock business listing Be the first listing in Chinnock Common questionsWhat is the postcode for Chinnock?Chinnock, NSW has the postcode 2550.What state is Chinnock in?Chinnock is in New South Wales (NSW).Does postcode 2550 cover more than one suburb?Yes. Postcode 2550 covers 52 localities, so the postcode alone does not identify Chinnock. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.