John Titor is the name used on several bulletin boards during 2000 and 2001 by a poster claiming to be a time traveler from 2036.

In these posts, Titor made numerous predictions about future events, some vague and some quite specific, starting with events in 2004. He described a drastically changed future in which the United States had broken up into five smaller regions, the environment and infrastructure had been devastated by a nuclear attack, and most other world powers had been destroyed.