Lake Innes House Ruins is a heritage-listed former rural holding and residence and now interpretative site and ruin at The Ruins Way, Port Macquarie, Port Macquarie-Hastings City Council, New South Wales, Australia. It was built from 1831 to 1848 by Major Archibald Clunes Innes. It is also known as Lake Innes House ruins and environs. The property is owned by Office of Environment and Heritage (New South Wales Government). It was added to the New South Wales State Heritage Register on 2 April 1999.