The Sleeper Awakes (1910) is a dystopian science fiction novel by English writer H. G. Wells, about a man who sleeps for two hundred and three years, waking up in a completely transformed London where he has become the richest man in the world. The main character awakes to see his dreams realised, and the future revealed to him in all its horrors and malformities.

The novel is a rewritten version of When the Sleeper Wakes, a story by Wells that was serialised between 1898 and 1899.