| Country: | South Korea |
| Dates: | 17–31 October 1999 |
| Num Teams: | 4 |
| Champion Other: | Suwon Samsung Bluewings |
| Second Other: | Busan Daewoo Royals |
| Matches: | 5 |
| Goals: | 9 |
| Prevseason: | 1998 |
| Nextseason: | 2000 |
The 1999 K League Championship was the sixth competition of the K League Championship, and was held to decide the 17th champions of the K League. It was contested between the top four clubs of the regular season. The first round was played as a single match between third place and fourth place of the regular season. The winners of the first round advanced to the semi-final, and played against runners-up of the regular season over two legs. The winners of the regular season directly qualified for the best-of-three final.
See main article: 1999 K League.
Busan Daewoo Royals won 2–0 on aggregate.
Suwon Samsung Bluewings won the series 2–0.
See main article: 1999 K League.