Old Man's Valley Cemetery is a heritage-listed former cemetery and now memorial landscape at Old Man's Valley, off Quarry Road, Hornsby in the Hornsby Shire local government area of New South Wales, Australia. It was designed by and built by members of the Higgins family between 1879 and 1931 with the assistance of monumental masons. It is also known as Higgin's Family Cemetery, Old Mans Valley Cemetery and Higgins Family Cemetery. The property is owned by Hornsby Shire Council. It was added to the New South Wales State Heritage Register on 22 December 2006.