NBL1 West
| Most recent season or competition: 2025 NBL1 West season | |
| Formerly | State Basketball League 1989–2020 |
|---|---|
| Sport | Basketball |
| Founded | 1989 |
| First season | 1989 |
| No. of teams | W: 13 M: 14 |
| Country | Australia |
| Continent | FIBA Oceania (Oceania) |
| Most recent champions | W: Cockburn Cougars (2nd title) M: Geraldton Buccaneers (4th 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.