| Competition: | Daum K3 League |
| Season: | 2010 |
| Dates: | 13 March – 20 November 2010 |
| Winners: | Gyeongju Citizen (1st title) |
| Best Player: | Choi Seok-do[1] |
| Matches: | 229 |
| Total Goals: | 829 |
| Prevseason: | 2009 |
| Nextseason: | 2011 |
The 2010 K3 League was the fourth season of amateur K3 League. The participating clubs were divided into two groups, and the winners and runners-up of both groups qualified for the championship playoffs. All clubs had interleague play once after playing home and away season in each group. Jeonju Ongoeul withdrew from the league, but Chuncheon FC and Yeonggwang FC joined the league.
----
----Gyeongju Citizen won 1–0 on aggregate.