Home Postcode finder NSW Lowther Lowther postcode NSW Lowther 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 Lowther business listing Be the first listing in Lowther Common questionsWhat is the postcode for Lowther?Lowther, NSW has the postcode 2790.What state is Lowther in?Lowther 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 Lowther. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.