The 2020–21 Milwaukee Bucks season was the 53rd season of the franchise in the National Basketball Association (NBA). On April 30, 2021, the Bucks clinched the Central Division for a record 10th time with a win over the Chicago Bulls. The Bucks finished the season with a 46–26 record (equal to 52 wins in an 82-game season), good enough for the third seed.
The Bucks began their playoff run by sweeping the sixth-seeded Miami Heat in the opening round, in a rematch of the Eastern Conference Semi-finals the previous year. The Bucks then defeated the second-seeded Brooklyn Nets in the Eastern Conference Semi-finals in seven games.
In the Eastern Conference Finals, the Bucks defeated the Atlanta Hawks in six games, reaching the NBA Finals for the first time in 47 years, and winning the Eastern Conference Finals for the first time in franchise history. The Bucks are the first NBA team to have won both a Western Conference and Eastern Conference championship in their history, as they were in the Western Conference when they reached the NBA Finals in 1971 and 1974.
The Bucks would face the Phoenix Suns in the NBA Finals. Despite losing the first two games, the Bucks won four straight, winning 4–2 and clinching their second NBA title, the first since 1971.