| 2023 Section XI Overall Championship Bracket | ||||||
| Tuesday | Saturday | Tuesday | Saturday | |||
| February 21, 2023 | February 25, 2023 | February 28, 2023 | March 4, 2023 | |||
| Pierson (14-7) | Kings Park (17-6) | |||||
| C Champion | A Champion | |||||
| 76-53 | Pierson (15-7) | 49-58 | Southampton (19-4) | |||
| @ Southampton HS | C/D Champion | @ Longwood HS | A/B/C/D Champion | |||
| Bridgehampton (16-5) | 52-69 | Southampton (18-4) | 61-64 | Brentwood (18-7) | ||
| D Champion | @ East Hampton HS | B/C/D Champion | @ Stony Brook University | Section XI Champion | ||
| Southampton (17-4) | Brentwood (17-7) | |||||
| B Champion | AA Champion | |||||