The 2015–16 Golden State Warriors season was the 70th season of the franchise in the National Basketball Association (NBA), and its 54th in the San Francisco Bay Area. The Warriors entered the season as the defending NBA champions and they went on to make NBA history by setting the best ever regular-season record of 73–9, breaking the 1995–96 Chicago Bulls record of 72–10. Golden State broke over twenty-five NBA records and more than ten franchise records this season, including most wins ever recorded in a season (regular-season and postseason combined); with 88. This team's regular-season is now considered by many analysts, players, and fans, to be the greatest in NBA history and one of the greatest in professional sports history. In the postseason, the Warriors beat the Houston Rockets 4–1 in the first round of the playoffs, the Portland Trail Blazers 4–1 in the Western Conference Semi-finals and they won the Western Conference Championship by beating the Oklahoma City Thunder 4–3, becoming just the 10th team to come back from a 1–3 deficit. The Warriors played the Cleveland Cavaliers in the NBA Finals for the second consecutive year, where they lost in seven games and became the first team in NBA history to give up a 3–1 lead in the Finals.

The Warriors began the 2015–16 season by winning their first 24 games, eclipsing the previous best start in NBA history, set by the 1993–94 Houston Rockets and the 1948–49 Washington Capitols at 15–0. Their record-setting start ended when they were defeated by the Milwaukee Bucks on December 12, 2015. The Warriors broke a 131-year-old record of 20–0 set by the 1884 St. Louis Maroons baseball team, to claim the best start to a season in all of the major professional sports in America. They also won 28 consecutive regular-season games dating back to the 2014–15 season, eclipsing the 2012–13 Miami Heat for the second longest winning streak in NBA history. The team set an NBA record 54-straight regular-season home game winning streak, which spanned from January 31, 2015 to March 29, 2016. The previous record of 44 was held by the 1995–96 Chicago Bulls. Golden State broke their franchise record of 28 road wins in a season which they set in 2014–15; they ended the season with 34, passing the same mid-90s Chicago Bulls team led by Michael Jordan for the most road wins in NBA history. The team became the first in NBA history to go the entire regular-season without back-to-back losses and without losing to the same team twice.

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