The Four Hundred

The Four Hundred can refer to:

• The oligarchic government controlling Athens after the Athenian coup of 411 BC
• The social elite of New York City in the late 19th century; term coined by Ward McAllister, supposedly the number of people Mrs William Backhouse Astor, Jr's ballroom could accommodate
• The Four Hundred (band) an indie rock band based out of Milwaukee, WI
• The Game's Four Hundred, a slogan used by The Baseball Register, a play on New York's social elite
• A series of passenger train services offered by Chicago and North Western Railway beginning with the Twin Cities 400 (originally named The 400) in the Midwestern United States
• New York State Route 400, also known as the Aurora Expressway, a highway in Erie County, New York
• Ontario Highway 400, a highway in Ontario