Home Postcode finder NSW Marlow Marlow postcode NSW Marlow 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 Marlow business listing Be the first listing in Marlow Common questionsWhat is the postcode for Marlow?Marlow, NSW has the postcode 2775.What state is Marlow in?Marlow 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 Marlow. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.