Home Postcode finder NSW Lower Macdonald Lower Macdonald postcode NSW Lower Macdonald is a locality in New South Wales covered by postcode 2775. Postcode 2775 State or territory New South Wales (NSW) Region Seven Hills Add a free Lower Macdonald business listing Be the first listing in Lower Macdonald Common questionsWhat is the postcode for Lower Macdonald?Lower Macdonald, NSW has the postcode 2775.What state is Lower Macdonald in?Lower Macdonald is in New South Wales (NSW).Does postcode 2775 cover more than one suburb?Yes. Postcode 2775 covers 17 localities, so the postcode alone does not identify Lower Macdonald. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.