| Philip I | |
| jure uxoris Count of Boulogne Count of Clermont-en-Beauvaisis | |
| Birth Name: | Philippe Hurepel |
| Birth Date: | September 1200 |
| House: | Capet |
| Father: | Philip II of France |
| Mother: | Agnes of Merania |
| Spouse: | Matilda II, Countess of Boulogne |
| Issue: | Joan, Countess of Nevers, Lady de Châtillon-Montjay Alberic, Count of Clermont |
Philip I of Boulogne (Philip Hurepel) (1200–1235) was a French prince, Count of Clermont-en-Beauvaisis in his own right, and Count of Boulogne, Mortain, Aumale, and Dammartin-en-Goële jure uxoris.
Philip was born in September 1200, the son of Philip II of France and his controversial third wife Agnes of Merania. Illegitimacy shadowed his birth and career, but he was legitimated by Pope Innocent III. He was associated with founding the Tour du Guet in Calais. He is the first recorded person to bear a differenced version of the arms of France.
Philip was married in c. 1223 to Matilda II, Countess of Boulogne. Philip, by right of his wife, became Count of Boulogne, Mortain, Aumale, and Dammartin-en-Goële. He revolted against his sister-in-law Blanche of Castile when his elder half-brother Louis VIII died in 1226. When Philip died in 1235, Matilda continued to reign and was married to Afonso III of Portugal.
Matilda and Philip had: