William of Champlitte
| William I | |
|---|---|
| Prince of Achaea | |
Coat of Arms of William of Champlitte | |
| Reign | 1205–1209 |
| Successor | Geoffrey I |
| Born | 1160s |
| Died | 1209 |
| Spouse | Alais of Meursault Elisabeth of Mount-Saint-Jean |
| House |
|
| Father | Odo I of Champlitte |
| Mother | Sybille |
William I of Champlitte (French: Guillaume de Champlitte) (1160s-1209) was a French knight who joined the Fourth Crusade and became the first prince of Achaea (1205–1209).