| Competition: | Tonga Major League |
| Season: | 2009 |
| Winners: | Marist FC |
| Prevseason: | 2008 |
| Nextseason: | 2010-11 |
The 2009 season of the Tonga Major League was the 31st season of top flight association football competition in Tonga.[1] Marist FC won the championship for the first time, ending an 11-year championship winning streak from Lotohaʻapai United.[2]