Lennox Castle is a historic building located in West Dunbartonshire, Scotland. Originally constructed in the early 19th century, it was designed in the Gothic Revival style by architect David Hamilton. The castle served as a private residence and later became a hospital for individuals with mental health issues. In the late 20th century, Lennox Castle was closed and fell into disrepair. Despite its dilapidated state, the castle remains a notable landmark, attracting interest from historians and photographers. Efforts have been made to preserve its history and explore potential redevelopment options for the site.