1998–99 Olympiacos F.C. season

The 1998–99 season was Olympiacos's 40th consecutive season in the Alpha Ethniki and their 74th year in existence. The club were played 2nd consecutive season in the UEFA Champions League. In the beginning of the summertime Olympiacos named Bosnian Dusan Bajevic coach.

First-team squad

 * Squad at end of season

Second qualifying round
All times at CET

Group stage
All times at CET

Quarter-finals
All times at CET

Team kit