Standings for the 2021 Class AA boys basketball season are below. For individual and team stats, please visit mtsportsmemories.com.
(Last updated March 1, 2021)
Eastern AA
| Conf. | Overall | |
| Great Falls High | 13-1 | 13-1 |
| Billings Skyview | 11-3 | 11-3 |
| Bozeman High | 10-4 | 10-4 |
| Billings Senior | 8-6 | 8-6 |
| Billings West | 7-7 | 7-7 |
| Great Falls CMR | 3-11 | 3-11 |
| Belgrade | 2-12 | 2-12 |
| Bozeman Gallatin | 2-12 | 2-12 |
Western AA
| Conf. | Overall | |
| Missoula Sentinel | 13-1 | 13-1 |
| Missoula Hellgate | 10-4 | 10-4 |
| Helena Capital | 8-6 | 8-6 |
| Butte | 7-7 | 7-7 |
| Kalispell Flathead | 6-8 | 6-8 |
| Missoula Big Sky | 6-8 | 6-8 |
| Kalispell Glacier | 6-8 | 6-8 |
| Helena High | 0-14 | 0-14 |
