The K3 League 2009 was the third season of the K3 League. The 2009 season was known as Daum K3 League 2009 due to the competition's sponsorship by Daum Communications Corp. In contrast to the previous two years where playoff systems were implemented, 2009 was a straight league season with each side playing each other once home and away. The team at the top of the table after the 32 matches (Pocheon FC) were crowned champions. The four other highest-placed clubs also earned a spot in the 2010 Korean FA Cup competition. The season began on 21 March 2009 and ended on 28 November 2009.