| Country | Tonga |
|---|---|
| Level on pyramid | 2 |
| Promotion to | Tonga Major League |
| Relegation to | Tonga Division II (formerly) |
| Domestic cup | Tonga Cup |
| Current champions | Longolongo FC (2026) |
The Tonga Division I is the second-tier league of football in Tonga, operating under the auspices of the Tonga Football Association.
There is promotion and relegation between the top club in the Division I and bottom club in the Major League, sometimes played as a promotion/relegation playoff. Previously, promotion and relegation also existed between the league and the Tonga Division II.
| Season | Champion | Ref. |
|---|---|---|
| 2006 | SC Lotohaʻapai | |
| 2009 | Longoteme FC | |
| 2010/2011 | Veitongo FC | |
| 2019 | Nukuhetulu FC | |
| 2026 | Longolongo FC | |