Lords, counts and dukes of Perche

One of these, Geoffroy III, would have been a leader of the Fourth Crusade had he not died before the assembled forces could depart.

Upon the death without children of the last Duke of Alençon in 1525, it returned to the crown, and was granted only sporadically thereafter.

The lords of Perche were originally titled lords of Mortagne-au-Perche, until Rotrou III adopted the style of count of Perche in 1126, thus uniting the lordship of Mortagne-au-Perche, the viscountcy of Châteaudun and the lordship of Nogent-le-Rotrou in the countship of Perche and Montagne.

Here after, the title is merged with the viscount of Châteaudun and the lord of Nogent-le-Rotrou.

After the death of Margaret of Navarre the fief went to the royal domain.