| Competition: | Slovenian Second League |
| Season: | 2002–03 |
| Winners: | Domžale |
| Promoted: | Domžale Drava Ptuj |
| League Topscorer: | Matjaž Majcen (26 goals) |
| Matches: | 240 |
| Total Goals: | 731 |
| Prevseason: | 2001–02 |
| Nextseason: | 2003–04 |
The 2002–03 Slovenian Second League season started on 11 August 2002 and ended on 15 June 2003. Each team played a total of 30 matches.