2009 U.S. Open may refer to:
*
2009 U.S. Open (golf), a major golf tournament
*
2009 US Open (tennis)
The 2009 US Open was a tennis tournament played on outdoor hard courts, held from August 31 to September 14, 2009, in the USTA Billie Jean King National Tennis Center at Flushing Meadows, New York City, United States. Originally, it was schedu ...
, a Grand Slam tennis tournament
*
2009 Lamar Hunt U.S. Open Cup, a soccer tournament for U.S. teams
*
2009 US Open Darts
{{disambig