| Competition: | Daum K3 League |
| Pixels: | 140px |
| Season: | 2009 |
| Dates: | 21 March – 28 November 2009 |
| Winners: | Pocheon FC (1st title) |
| Best Player: | Oh Tae-hwan[1] |
| League Topscorer: | Jeon Hat-bit (21 goals) |
| Best Goalkeeper: | Kim Dong-young |
| Matches: | 272 |
| Total Goals: | 1020 |
| Prevseason: | 2008 |
| Nextseason: | 2010 |
The 2009 K3 League, also known as Daum K3 League 2009, was the third season of the amateur K3 League.[2] All clubs played home and away season, and the playoffs were not held in this year. Before the start of the season, Changwon United and Seoul Pabal withdrew from the league, but Cheongju Jikji, Icheon Citizen and Seoul FC Martyrs joined the league.