The Women's National Basketball Association (WNBA) is a professional basketball league in the United States. It is currently composed of twelve teams. 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 (except in Olympic years) and the WNBA Finals at the end of September until the beginning of October. Due to the COVID-19 pandemic, plans to hold a midseason tournament, the Commissioner's Cup, starting in the 2020 season were placed on hold. Initially, regular-season Cup games were to be played through early July, followed by a final match in August. The pandemic also led to the entire 2020 season being held without fans at the IMG Academy in Bradenton, Florida.

Five WNBA teams have direct NBA counterparts and normally play in the same arena: Indiana Fever, Los Angeles Sparks, Minnesota Lynx, New York Liberty, and Phoenix Mercury. The Atlanta Dream, Chicago Sky, Connecticut Sun, Dallas Wings, Las Vegas Aces, Seattle Storm, and Washington Mystics do not share an arena with a direct NBA counterpart, although four of the seven (the Dream, the Sky, the Wings, and the Mystics) share a market with an NBA counterpart, two (Mystics and Dream) play in NBA G League arenas, while the Storm shared an arena and market with an NBA team at the time of its founding. The Dream, Sky, Sun, Wings, Aces, Sparks, and Storm are all independently owned. The Aces are owned by an owner who also owns an NFL team (Mark Davis of the NFL team in the same market).