| Club: | Feyenoord |
| Season: | 1998–99 |
| Manager: | Leo Beenhakker |
| Chairman: | Jorien van den Herik |
| Stadium: | De Kuip |
| League: | Eredivisie |
| League Result: | 1st |
| Cup1: | KNVB Cup |
| Cup1 Result: | Semi-finals |
| Cup2: | UEFA Cup |
| Cup2 Result: | Quarter-finals |
| Prevseason: | 1997–98 |
| Nextseason: | 1999–2000 |
During the 1998–99 Dutch football season, Feyenoord competed in the Eredivisie.
Feyenoord won the Eredivisie with a comfortable 15-point margin over runners-up Willem II. This was their last Dutch league title until 2017.