This is a list of seasons completed by the

Boston Celtics The Boston Celtics ( ) are an American professional basketball team based in Boston. The Celtics compete in the National Basketball Association (NBA) as a member of the league's Eastern Conference Atlantic Division. Founded in 1946 as one of t ...

of the

National Basketball Association The National Basketball Association (NBA) is a professional basketball league in North America. The league is composed of 30 teams (29 in the United States and 1 in Canada) and is one of the major professional sports leagues in the United S ...

. It documents the team’s season-by-season records, including postseason records, and also includes year-end awards won by the team's players and/or coaches. With seventeen NBA Championships, the Celtics are tied with the

Los Angeles Lakers The Los Angeles Lakers are an American professional basketball team based in Los Angeles. The Lakers compete in the National Basketball Association (NBA) as a member of the league's Western Conference Pacific Division. The Lakers play their ...

for the most amongst all NBA franchises, while the 1959-to-1966 domination of the NBA Championship, with eight straight titles, is the longest consecutive championship winning streak of any major professional sport team to date. Following this, the Celtics had two major periods of success separated by quite poor seasons during rebuilding. Between 1971–72 and 1975–76 the Celtics, led by

Dave Cowens David William Cowens ( ; born October 25, 1948) is an American former professional basketball player and NBA head coach. At , he played the center position and occasionally played power forward. Cowens spent most of his playing career with the Bo ...

and

John Havlicek John Joseph Havlicek ( ; April 8, 1940 – April 25, 2019) was an American professional basketball player who spent his entire career with the Boston Celtics, winning List of NBA players with most championships, eight NBA championships, four of ...

, won 294 of 410 regular season games and reached the conference finals in each of those five seasons, winning two more NBA championships, whilst between 1979–80 and 1987–88 led by the frontcourt of Larry Bird, Kevin McHale and Robert Parish the Celtics won 550 of 742 regular season games and reached every Conference Final except for 1982–83 when they were swept in the Conference Semifinals by the Milwaukee Bucks. The Celtics have had 13 separate seasons where they won 60 or more regular season contests, the highest number for any franchise. Between 1993–94 and 2006–07 the Celtics had their single sustained period of failure, with an overall win percent of and only twice getting beyond the first playoff round. With the acquisition of Kevin Garnett for 2007–08, the Celtics achieved a record single-season rise in win percentage to claim their first title in twenty-two seasons, in the process achieving the best average point differential between the 1995–96 Bulls and the 2015–16 Warriors. The team remained a power until after the 2011 lockout, but lost to the Lakers in their most recent Finals appearance. The Celtics are 23–8 all-time in seventh games of playoff series,Celtics Game 7 History
''

NBA The National Basketball Association (NBA) is a professional basketball league in North America. The league is composed of 30 teams (29 in the United States and 1 in Canada) and is one of the major professional sports leagues in the United St ...

.com'', May 18, 2008. and 7–1 in Game 7 of the

NBA Finals The NBA Finals is the annual championship series of the National Basketball Association (NBA). The Eastern and Western Conference champions play a best-of-seven game series to determine the league champion. The team that wins the series is awa ...

Seasons

''Note: Statistics are correct as of the .''

All-time records

''Note: Statistics are correct as of the .''

References

{{NBA season-by-season team history Events in Boston seasons