Home Postcode finder NSW Howes Valley Howes Valley postcode NSW Howes Valley is a locality in New South Wales covered by postcode 2330. Postcode 2330 State or territory New South Wales (NSW) Region Hunter Add a free Howes Valley business listing Be the first listing in Howes Valley Common questionsWhat is the postcode for Howes Valley?Howes Valley, NSW has the postcode 2330.What state is Howes Valley in?Howes Valley is in New South Wales (NSW).Does postcode 2330 cover more than one suburb?Yes. Postcode 2330 covers 63 localities, so the postcode alone does not identify Howes Valley. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.