Home Postcode finder NSW Kelvin Kelvin postcode NSW Kelvin is a locality in New South Wales covered by postcode 2380. Postcode 2380 State or territory New South Wales (NSW) Region NSW North Coast Add a free Kelvin business listing Be the first listing in Kelvin Common questionsWhat is the postcode for Kelvin?Kelvin, NSW has the postcode 2380.What state is Kelvin in?Kelvin is in New South Wales (NSW).Does postcode 2380 cover more than one suburb?Yes. Postcode 2380 covers 9 localities, so the postcode alone does not identify Kelvin. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.