Baldwin III | |
|---|---|
| Born | 1088 |
| Died | 1120 |
| Buried | Mons, Belgium |
| Noble family | House of Flanders |
| Spouse(s) | Yolande of Guelder |
| Issue | Baldwin IV, Count of Hainaut |
| Father | Baldwin II, Count of Hainaut |
| Mother | Ida of Louvain |
Baldwin III (1088–1120) was count of Hainaut from 1098 to his death.