| 2021 NBL1 season | |
|---|---|
| League | NBL1 |
| Sport | Basketball |
| Duration | Season that was scheduled: 10 April – 5 September (Conference seasons) 10–12 September (NBL1 National Finals) |
The 2021 NBL1 season was the second season of the NBL1 after the 2020 season was cancelled due to the COVID-19 pandemic. With North and Central conferences introduced in 2020 alongside the South Conference, the NBL1 expanded further in 2021 with the inclusion of a West Conference.
The 2021 season was the first to consist of multiple conferences and National participation, however the continued impact of the pandemic led to a disrupted and incomplete end to the season.