| Competition: | Superettan |
| Season: | 2003 |
| Winners: | Kalmar FF |
| Promotion To: | Allsvenskan |
| Matches: | 240 |
| Prevseason: | 2002 |
| Nextseason: | 2004 |
The 2003 Superettan was part of the 2003 Swedish football season, and the fourth season of Superettan, Sweden's second-tier football division in its current format. A total of 16 teams contested the league.
It was contested by 16 teams, and Kalmar FF won the championship.
| Rank | Player | Club | Goals[1] |
|---|---|---|---|
| 1 |  Göran Marklund | Café Opera/Djursholm | 23 |
| 2 | Mats Lilienberg | Trelleborgs FF | 18 |
| 3 |  Dioh Williams | BK Häcken | 16 |
| 4 | Mats Haglund | Åtvidabergs FF | 15 |
| 5 | Niclas Fredriksson | IFK Norrköping | 14 |
| Daniel Westlin | Gefle IF | 14 | |
 Daniel Mendes | Kalmar FF | 14 | |
| 8 | Stefan Bärlin | Västerås SK | 13 |
| Magnus Eriksson | IFK Malmö | 13 | |
| 10 | Christos Christoforidis | Assyriska | 12 |
| Henrik Andersson | BK Forward | 12 |