| Competition: | Turkish Second League Category A |
| Season: | 2002–03 |
| Winners: | Konyaspor |
| Promoted: | Konyaspor, Çaykur Rizespor, Akçaabat Sebatspor |
| Relegated: | Erzurumspor, Gümüşhane Doğanspor, Şekerspor |
| League Topscorer: | Yunus Altun (24) |
| Matches: | 306 |
| Total Goals: | 850 |
| Prevseason: | 2001–02 |
| Nextseason: | 2003–04 |
The 2002–03 Turkish Second League Category A was the second-level football league of Turkey and the 40th season since its establishment in 1963–64. At the end of the season in which 18 teams competed in a single group, Konyaspor, Çaykur Rizespor and Akçaabat Sebatspor, which finished the league in the first three places, were promoted to the upper league, while Erzurumspor, Gümüşhane Doğanspor and Şekerspor, which were in the last three places, were relegated.[1]
| Rank | Player | Club | Goals |
|---|---|---|---|
| 1 |  Yunus Altun | Çaykur Rizespor | 24 |
| 2 | Taner Demirbaş | Adana Demirspor | 19 |
| 3 | Halim Karaköse | İzmirspor | 16 |
| 4 | Burak Akdiş | Sivasspor | 15 |
| 5 | Mustafa Özsöğüt | Yimpaş Yozgatspor | 14 |
| Okan Öztürk | Çaykur Rizespor | 14 | |
| 7 | Adem Akın | Konyaspor | 12 |
| Bayram Çolak | B.B. Ankaraspor | 12 | |
| Birol Aksancak | B.B. Ankaraspor | 12 | |
| Orhan Kaynak | Kayserispor | 12 |