Liga ASOBAL 1998–99
Liga ASOBAL 1998–99 season was the ninth since its establishment. A total of 14 teams competed this season for the championship.
Competition format
This season, the competition format consisted in two phases.| Phase | Remark |
| First | All teams competed in the first phase through 26 rounds in a round-robin format. |
| Second | The second phase was divided in two groups; the first four teams competed for the championship, and the last four teams competed for the permanence. |
Overall standing
In–Out playoff
- ''Bidasoa remained in Liga ASOBAL.''
Top goal scorers
| Player | Goals | Team |
 |