The 2012 US Open was a tennis tournament played on the outdoor hard courts at the USTA Billie Jean King National Tennis Center in Flushing Meadows Park, of Queens, New York City, United States. It was played from August 27 to September 10. As a result of adverse weather conditions on September 8, which included a full evacuation of the National Tennis Center because of an upcoming tornado, another day was added to the schedule for the fifth straight year, with the women's final postponed to the afternoon of Sunday, September 9 rather than the previous evening, the men's semi-final between Novak Djokovic and David Ferrer suspended on September 8 and completed on September 9, and the men's final postponed to the afternoon of Monday, September 10.

The US Open Tennis Championships, commonly called the US Open, is a hardcourt tennis tournament held annually in Queens, New York. Since 1987, the US Open has been chronologically the fourth and final Grand Slam tournament of the year. The other three, in chronological order, are the Australian Open, French Open and Wimbledon. The US Open starts on the last Monday of August and continues for two weeks, with the middle weekend coinciding with the US Labor Day holiday. The tournament is one of the oldest tennis championships in the world, originally known as the U.S. National Championship, for which men's singles and men's doubles were first played in August 1881. It is the only Grand Slam that was not affected by cancellation due to World War I and World War II, nor interrupted by the COVID-19 pandemic in 2020. All the players participating should be at least fourteen (14) years old.