List of Mainstream Top 40 number-one hits of 2009 (U.S.)

This list of number-one hits on the Mainstream Top 40 charts in 2009. They were published by the U.S. magazine Billboard. This year there were 20 leaders.

  • 2 weeks ( January 24-February 6 )
  • 3 weeks ( February 7 to February 27 )
  • 4 weeks ( March 14-April 10 )
  • 2 weeks ( April 11 to April 24 )
  • 5 weeks ( April 25 to May 29 )
  • 6 weeks ( May 30 to July 10 )
  • 3 weeks ( July 18-August 7 )
  • 2 weeks ( August 8 to August 21 )
  • 7 weeks ( August 22-October 9 )
  • 3 weeks ( October 17 to November 6 )
  • 2 weeks ( November 14 to November 27 )
  • 4 weeks ( November 28 to December 25 )
  • Three weeks (December 26, 2009 - January 15, 2010 )

 

Womanizer (song) Just Dance (song) Single Ladies (Put a Ring on It) Circus (song) You Spin Me Round (Like a Record) Poker Face (Lady Gaga song) Boom Boom Pow 3OH!3 LoveGame The E.N.D. Jay Sean Party in the U.S.A. Paparazzi (Lady Gaga song) Iyaz Replay (Iyaz song) List of number-one Billboard Mainstream Top 40 hits List of Billboard Mainstream Top 40 number-one songs of the 1990s List of Mainstream Top 40 number-one hits of 1993 (U.S.) List of Mainstream Top 40 number-one hits of 1994 (U.S.) List of Mainstream Top 40 number-one hits of 1995 (U.S.) List of Mainstream Top 40 number-one hits of 1996 (U.S.) List of Mainstream Top 40 number-one hits of 1997 (U.S.) List of Mainstream Top 40 number-one hits of 1998 (U.S.) List of Mainstream Top 40 number-one hits of 1999 (U.S.) List of Mainstream Top 40 number-one hits of 2000 (U.S.) List of Mainstream Top 40 number-one hits of 2001 (U.S.) List of Mainstream Top 40 number-one hits of 2002 (U.S.) List of Mainstream Top 40 number-one hits of 2003 (U.S.) List of Mainstream Top 40 number-one hits of 2004 (U.S.) List of Mainstream Top 40 number-one hits of 2005 (U.S.) List of Mainstream Top 40 number-one hits of 2006 (U.S.) List of Mainstream Top 40 number-one hits of 2007 (U.S.) List of Mainstream Top 40 number-one hits of 2008 (U.S.) List of Mainstream Top 40 number-one hits of 2010 (U.S.) List of Mainstream Top 40 number-one hits of 2011 (U.S.) List of Mainstream Top 40 number-one hits of 2012 (U.S.)
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