This is a list of seasons completed by the Boston Celtics of the National Basketball Association. It documents the team's season-by-season records, including post-season records, and also includes year-end awards won by the team's players and/or coaches. With 17 NBA Championships, the Celtics have won the most for any NBA franchise, while the 1959-to-1966 domination of the NBA Championship, with eight straight titles, is the longest consecutive championship winning streak of any North American professional sports team to date.