Home Postcode finder NSW Hermitage Flat Hermitage Flat postcode NSW Hermitage Flat is a locality in New South Wales covered by postcode 2790. Postcode 2790 State or territory New South Wales (NSW) Region NSW Country West Add a free Hermitage Flat business listing Be the first listing in Hermitage Flat Common questionsWhat is the postcode for Hermitage Flat?Hermitage Flat, NSW has the postcode 2790.What state is Hermitage Flat in?Hermitage Flat is in New South Wales (NSW).Does postcode 2790 cover more than one suburb?Yes. Postcode 2790 covers 40 localities, so the postcode alone does not identify Hermitage Flat. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.