| Season: | 2003 |
| Competition: | Samsung Hauzen K League |
| Winners: | Seongnam Ilhwa Chunma (6th title) |
| Continentalcup1: | Champions League |
| Continentalcup1 Qualifiers: | Seongnam Ilhwa Chunma Jeonbuk Hyundai Motors |
| Matches: | 264 |
| Total Goals: | 675 |
| Best Player: | Kim Do-hoon |
| League Topscorer: | Kim Do-hoon (28 goals) |
| Prevseason: | 2002 |
| Nextseason: | 2004 |
The 2003 K League was the 21st season of the K League. It kicked off on March 23, and was finished on 16 November.
| Rank | Player | Club | Goals | Apps | |
|---|---|---|---|---|---|
| 1 | Kim Do-hoon | Seongnam Ilhwa Chunma | 28 | 40 | |
| 2 |  Dodô | Ulsan Hyundai Horang-i | 27 | 44 | |
| Magno Alves | Jeonbuk Hyundai Motors | 27 | 44 | ||
| 4 | Itamar | Jeonnam Dragons | 23 | 34 | |
| 5 |  Edmilson | Jeonbuk Hyundai Motors | 17 | 39 | |
| 6 | Shin Byung-ho | Jeonnam Dragons | 16 | 42 | |
| 7 | Woo Sung-yong | Pohang Steelers | 15 | 40 | |
| 8 | Nadson | Suwon Samsung Bluewings | 14 | 18 | |
| Tuta | Suwon Samsung Bluewings | 14 | 31 | ||
| 10 | Andy Cooke | Busan I'Cons | 13 | 22 |
