800 (disambiguation)

Year 800 was a leap year starting on Wednesday of the Julian calendar.

800 may also refer to:
 * 800 (number), the number
 * 800 BC, a year
 * The original toll-free area code for telephone calls in the North American Numbering Plan and some other countries
 * The international direct dial code for toll-free international phone calls
 * ISO 800, a common film speed for photographic films
 * 800 AM, an AM radio station frequency
 * TWA Flight 800, the flight number of an airplane disaster
 * The Atari 800 home computer
 * A perfect score on an individual section of the SAT test or on one of the SAT Subject Tests
 * 800 metres, the name and distance in metres of an athletic event
 * Hawker 800, a British aircraft
 * Rover 800, a British automobile
 * "800", a song by Saliva from their album Saliva (album)
 * Nokia Lumia 800, a smartphone running Windows Phone operating system
 * SEAT 800, a 4-door variant of the SEAT 600