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