The Phoenix Mercury are an American professional basketball team based in Phoenix, Arizona, playing in the Western Conference in the Women's National Basketball Association (WNBA). One of eight original franchises, it was founded before the league's inaugural 1997 season began.

The Women's National Basketball Association (WNBA) is the premier women's professional basketball league. It is composed of 12 teams, all based in the United States. The league was founded on April 22, 1996, as the women's counterpart to the National Basketball Association (NBA), and league play started in 1997. The regular season is played from May to September, with the All Star game being played midway through the season in July and the WNBA Finals at the end of September until the beginning of October.