Scottish League One
| Founded | 2013 |
|---|---|
| Country | Scotland |
| Confederation | UEFA |
| Number of clubs | 10 |
| Level on pyramid | 3 |
| Promotion to | Scottish Championship |
| Relegation to | Scottish League Two |
| Domestic cup(s) | Scottish Cup |
| League cup(s) | Scottish League Cup Scottish Challenge Cup |
| Current champions | Arbroath (2nd title) (2024–25) |
| Most championships | Dunfermline Athletic Arbroath (2 titles) |
| Broadcaster(s) | BBC Alba |
| Website | spfl |
| Current: 2025–26 Scottish League One | |
The Scottish League One, known as William Hill League One for sponsorship reasons, is the third tier of the Scottish Professional Football League, the league competition for men's professional football clubs in Scotland. The Scottish League One was established in July 2013, after the Scottish Professional Football League was formed by a merger of the Scottish Premier League and Scottish Football League.