| Most recent season or competition: 2024 NBL1 West season | |
 | |
| Formerly | State Basketball League 1989–2020 |
|---|---|
| Sport | Basketball |
| Founded | 1989 |
| First season | 1989 |
| General Manager | Brighton Pass |
| No. of teams | W: 13 M: 14 |
| Country | Australia |
| Continent | FIBA Oceania (Oceania) |
| Most recent champion(s) | W: Rockingham Flames (4th title) M: Mandurah Magic (1st title) |
| Most titles | W: Willetton Tigers (9 titles) M: Perry Lakes Hawks (7 titles) |
| Official website | NBL1.com.au/West |
NBL1 West, formerly the State Basketball League (SBL), is a semi-professional basketball league in Western Australia, comprising both a men's and women's competition. In 2020, Basketball Western Australia partnered with the National Basketball League (NBL) to bring NBL1 to Western Australia. NBL1 replaced the former SBL to create more professional pathways and opportunities for males and females playing basketball in Western Australia. As a result, the SBL became the west conference of NBL1.