This is a list of the all-time best regular season winning percentages in the NBA.[1][2]
| NBA Champions | |
| Conference Champions | |
| Active season |
- ^ Matt Chandler (2019). Pro basketball records : a guide for every fan. North Mankato, MN: Capstone. p. 40. ISBN 9781543559323.
- ^ Russell Ash (2002). Top 10 of everything 2003 (1st American ed.). London: Dorling Kindersley. p. 254. ISBN 9780789489180.