Margaret I | |
|---|---|
 Margaret's effigy on a seal | |
| Successor | Baldwin IX |
| Born | circa 1145 |
| Died | 15 November 1194 |
| Buried | St. Donatian's Cathedral in Bruges |
| Noble family | Metz |
| Spouse(s) | Ralph II, Count of Vermandois Baldwin V, Count of Hainaut |
| Issue | Isabelle of Hainaut, Baldwin VI of Hainaut, Yolanda of Flanders, Philip I of Namur, Henry of Flanders, Sybille of Hainaut, Eustace of Flanders, Godfrey of Hainaut |
| Father | Thierry, Count of Flanders |
| Mother | Sibylla of Anjou |
Margaret I (c. 1145 - died 15 November 1194) was the countess of Flanders suo jure from 1191 to her death.