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