NBA Fanbases: Ranking NBA Fanbases by Attendance

11. Boston Celtics (Average Attendance: 18,624)

The Boston Celtics had a slow start but have won seven straight games and once again look like one of the best teams in the Eastern Conference.

With a promising young core, Boston fans are fully behind this Celtics team and are selling out the TD Garden every night. We will soon see if the Celtics can get back to the NBA Finals after knocking on the door for the last couple of years.