| Abbreviation | Definition |
|---|---|
| BEF | Basketball Enhancement Fund |
| BFIJ | Bulls Fan in Japan |
| BGBL | Bethesda Girls Basketball League |
| BGBL | Boston Gay Basketball League |
| BGBL | Boston GLBTQ Basketball League |
| BHBL | Beverly Hills Basketball League |
| BIBL | Balkan International Basketball League |
| BIL | Ball Is Life |
| BIPPS | Basketball Ireland Post Primary Schools |
| BLAB | Basketball League of Amazing Benchwarmers |
| BLB | Basketball League Belgium |
| BLBA | Bonney Lake Basketball Academy |
| BLYB | Beijing International Youth Basketball |
| BNB | Basketball New Brunswick |
| BNBC | Basketball New Business Club |
| BNL | Basketball National League |
| BNS | Basketball Nova Scotia |
| BPBA | Bellarine Peninsula Basketball Association |
| BPD | Basketball Player Development |
| BPI | Basketball Power Index |