The 21st century of the Anno Domini or Common Era runs from 2001 through 2100.
21st century may also refer to:
Media Twenty-First Century, a Hong Kong intellectual journal influential in China during the early 1990s The 21st Century, an American television news show hosted by Walter Cronkite, originally called The 20th Century 21st Century Fox, an American mass-media conglomerate acquired by Disney
Music 21st Century (Blue System album), 1994 "21st Century Girl", a song from Wings by the group BTS 21st Century (Groove Coverage album), 2006 21st Century, an album by Lincoln Thompson, 1997
"21st Century (Digital Boy)", a song by Bad Religion, 1990 "21st Century", a song by Red Hot Chili Peppers from Stadium Arcadium, 2006 "21st Century Boy", a song by Sigue Sigue Sputnik, 1986 21st Century Romance, a song from 7th Year: A Moment of Stillness in the Thorns by the group Tomorrow X Together 21st Century Breakdown, an album by Green Day, 2009 Twenty First Century Skinned, an album by Praga Khan, 1999
"21st Century Schizoid Man", a song by King Crimson, 1969
Business 21st Century Network (21CN), a networking project by BT Group plc 21st Century Insurance, a subsidiary of Farmers Insurance Group
See also 21st century BC Century 21 (disambiguation) Siglo XXI (disambiguation)