400 (disambiguation)

The Four Hundred may refer to:

• The 400, a dismantled secret cell of the Cali Cartel run by Jorge Alberto Rodríguez
• The 400 (renamed the Twin Cities 400), a named passenger train operated by the Chicago and North Western Railway
• The Four Hundred, the oligarchic government controlling Athens after the Athenian coup of 411 BC
• The Four Hundred, the social elite of New York City in the late 19th century
• The Four Hundred (band), an American indie rock band
• The Game's Four Hundred, the subtitle of the almanac, the Baseball Register
• New York State Route 400, a state highway located within Erie County, New York
• Ontario Highway 400, a400-series highway in the Canadian province of Ontario