| Nextseason: | 2003–04 |
| Turkish Basketball League | |
| Season: | 2002–03 |
| Champions: | Efes Pilsen (10th title) |
| Runners Up: | Ülker |
| Semifinalists: | Galatasaray, Türk Telekom |
| Top Scorer: | Dewayne Jefferson |
| Ppg: | 23.4 |
| Rebounds Leader: | Gary Sankes |
| Rpg: | 12.2 |
| Assists Leader: | Mark Dickel |
| Apg: | 5.7 |
The 2002–03 Turkish Basketball League was the 37th season of the top-tier professional basketball league in Turkey. The season started on October 4, 2002. Efes Pilsen won their tenth national championship this season.
as of June 30, 2003
The 2003 Turkish Basketball League play-offs is the final phase of the 2002–2003 regular season.
First round, Quarterfinal and Semifinal series are 5-match series. The teams reaches the first 3 wins is through to the next round. The team which has won both regular season matchups starts with a 1–0 lead to the series. If teams split up the regular season meetings, series starts with a 1–1 draw.
Final series are 7-match series and the team reaches first 4 wins is the champion of the Turkish Basketball League.