List of National Basketball Association seasons

The National Basketball Association (NBA) is major professional basketball league in North America. The league was founded in 1946 as the Basketball Association of America (BAA). The league adopted its current name at the start of when it merged with the National Basketball League (NBL). The league currently consists of thirty teams, of which twenty-nine are located in the United States and one in Canada. Each team play 82 games in the regular season. Eight teams from each of the league's two conferences qualified for the playoffs. The winners of the Conference Finals advanced to the finals to determine the NBA champions.

The Boston Celtics have had or tied for the best regular season record for a record 18 times. They won the Eastern Conference (known as the Eastern Division until 1970) for a record 21 times, while the Los Angeles Lakers won the Western Conference (known as the Western Division until 1970) for a record 31 times. The Celtics won 17 NBA championships, the most in NBA history. The Lakers followed them with 16 titles from their 31 Finals appearances. The Celtics and the Lakers had played each other in the Finals for a record 12 times. The Celtics won 9 of their matchups while the Lakers have only won 3.

The best single regular season record was recorded by the Chicago Bulls in the . In that season, the Bulls recorded 72 wins and 10 losses with a winning percentage of .878. The Bulls then went on to win the Eastern...
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