| Dirk I | |
|---|---|
| Count of West Frisia | |
| Reign | c. 896 – c. 928 or 939 |
| Predecessor | Gerolf |
| Successor | Dirk II |
| Born | c. 870 |
| Died | 928/944 |
| Burial | |
| Spouse | Geva |
| Issue | Dirk II |
| House | House of Gerulfings |
| Father | Possibly Gerolf or Radbod, Prince of the Frisians |
Dirk I (Frisian Durk I or Diderik, Latin Theoderic or Thidericus Fresonie, German Dietrich) was count of West Frisia, later known as the County of Holland. He is thought to have been in office from c. 896 to c. 928 or 939.