The 2010–11 Dallas Mavericks season was the 31st season of the franchise in the National Basketball Association (NBA).

This season would prove to be the most successful season for the Mavericks. In the playoffs, the Mavericks defeated the Portland Trail Blazers in six games in the first round, then swept the defending two-time NBA champion Los Angeles Lakers in four games in the semi-finals, before defeating the Oklahoma City Thunder in five games in the Conference Finals to reach the NBA Finals for the first time since 2006. In the NBA Finals, the Mavericks faced off against the Miami Heat in a rematch of the 2006 NBA Finals, and the Heat were led by their Big Three of LeBron James, Dwyane Wade, and Chris Bosh. The Mavericks would go on to defeat the Heat in six games in the NBA Finals, winning their first NBA championship in franchise history.^[1] This would be their last playoff series win until 2022.

The Mavericks' championship was the first major sports championship in the Dallas-Fort Worth area since the Dallas Stars in 1999, and the first title in Mavericks franchise history. The Mavericks became the third team to win an NBA title in the state of Texas, joining the Houston Rockets and San Antonio Spurs. The Mavericks were the third team to win a major sports championship in the Dallas-Fort Worth area, joining the Dallas Cowboys and the Dallas Stars. The Mavericks championship parade was held on June 16, 2011 in downtown Dallas.

• June 24 – The 2010 NBA draft was held in New York City.
• July 1 – The free agency period began.

The Mavericks' playoff run began with a six-game first round series against the Portland Trail Blazers. In the conference semi-finals, the Mavericks swept the two-time defending champion Los Angeles Lakers. The series against the Lakers also birthed the Mavericks Royal Blue-Out games in the AAC, with almost all fans wearing T-shirts that read "The Time is Now". In the Western Conference Finals against the Oklahoma City Thunder, the Mavericks won the last three games with fourth-quarter comebacks to win their second Western Conference Championship and earn a trip to the NBA Finals for the first time since 2006. Following a disappointing Game One, the Mavericks pulled the biggest comeback in NBA Finals history in Game Two to even the series at a game each. After a loss in Game Three, the Mavericks won the last two games in Dallas to take a 3–2 series lead heading to Game Six in Miami. The Mavericks won Game Six; with that win, the Mavs became NBA Champions for the first time.

Rodrigue Beaubois injured his foot during a practice session with the France national team. Beaubois broke the fifth metatarsal bone in his left foot. He underwent surgery, which was successful.^[19] He rebroke his foot, but returned to practice at February 8, 2011.^[20] Beaubois made his comeback in a game against Sacramento on February 16.

On January 4, 2011, Caron Butler was ruled out for the rest of the season after undergoing surgery to repair a ruptured right patellar tendon.^[21]

Head coach Rick Carlisle did not make the trip to Oklahoma because he was recovering from a minor arthroscopic knee surgery.^[22]

During a game against Milwaukee, Caron Butler injured his right knee and did not return to the game. Butler suffered a ruptured right patellar tendon on his right knee, underwent surgery on Tuesday, January 4, and missed the remainder of the season.^[23]

During the first quarter of a game against Detroit, Aleksandar Pavlović suffered a broken nose.

Rodrigue Beaubois missed Game 1 of the playoff series against Portland due to a foot sprain.^[24] He also missed Games 2–5 of the same series.

Dirk Nowitzki tore a tendon in the middle finger of his left (non-shooting) hand in Game 1 of the NBA Finals.^[25]

During the Finals against Miami, Brendan Haywood missed Game 3 due to a strained right hip flexor.^[26] He returned to play Game 4, but could not move well and only played a few minutes.^[27]

• 2010–11 NBA season