| 2002–03 OK Liga | |
| Sport: | Roller hockey |
| League: | OK Liga |
| Second Place: | Noia Freixenet |
| Relegate To: | Primera División |
| Relegate: | AstralPool Maçanet Distrito Macarena |
| Seasonslistnames: | OK Liga |
| Prevseason Link: | 2001–02 División de Honor de Hockey Patines |
| Prevseason Year: | 2001–02 |
| Nextseason Link: | 2003–04 OK Liga |
| Nextseason Year: | 2003–04 |
The 2002–03 OK Liga was the 34th season of the top-tier league of rink hockey in Spain.
Barcelona finished the league as champion, after beating Noia Freixenet 3–0 in the finals. Noia Freixenet ended in the 12th position at the end of the regular season.
Sixteen teams joined the league. The three first teams at the end of the regular season qualified directly for the quarterfinals while teams from fourth to 13th joined the round of 16.
The three last teams were relegated to Primera División.
Quarterfinals were played with a best-of-three format, while semifinals and final were played with a best-of-five series.
Seeded teams played games 1, 2 and 5 of the series at home.
Source: [1]
| width=30 | ! | Team | Qualification or relegation |
|---|---|---|---|
| 1 | CERH European League | ||
| 2 | Noia Freixenet | ||
| 3 | Vic | ||
| 4 | CERS Cup | ||
| 5 | Barna Work Igualada | ||
| 6 | Viva Hàbitat Blanes | ||
| 7 | Motul Voltregà | ||
| 8 | |||
| 9 | Lleida Llista Blava | ||
| 10 | CERH European League | ||
| 11 | |||
| 12 | Century21 Alcobendas | ||
| 13 | Vilanova RSM | ||
| 14 | Relegation to Primera División | ||
| 15 | Distrito Macarena | ||
| 16 | Caixa Penedès Vilafranca |
| Tourney Name: | Copa del Rey |
| Year: | 2004 |
| Dates: | 13–16 March 2003 |
| Arena: | Vilanova i la Geltrú |
| Champion: | Barcelona |
| Second: | Vic |
| Prevseason: | 2002 |
| Nextseason: | 2004 |
The 2003 Copa del Rey was the 60th edition of the Spanish men's roller hockey cup. It was played in Vilanova i la Geltrú between the seven first qualified teams after the first half of the season and Vilanova RMS as host team.
Barcelona won their 15th trophy.[2]