in each conference. The Atlantic Division began with four inaugural members, the Celtics, the Braves, the Knicks and the 76ers. The Celtics, the Knicks and the 76ers all joined from the Eastern Division.

The Celtics have won the most Atlantic Division titles with 26. Twelve NBA champions have come from the Atlantic Division. The Celtics have won seven NBA championships while in the Division, while the Knicks have won three championships,