This department has 363 communes.
| Code | Name | Population |
|---|---|---|
| 28085 | Chartres | 38 324 |
| 28134 | Dreux | 31 543 |
| 28218 | Lucé | 15 921 |
| 28088 | Châteaudun | 12 830 |
| 28404 | Vernouillet | 12 310 |
This department has 17 cantons.
| Code | Name | Central office |
|---|---|---|
| 2801 | Anet | Anet |
| 2802 | Auneau | Auneau-Bleury-Saint-Symphorien |
| 2803 | Brou | Brou |
| 2804 | Chartres-1 | Chartres |
| 2805 | Chartres-2 | Chartres |
This department has 4 departmental arrondissements.
| Code | Name | Administrative seat |
|---|---|---|
| 281 | Chartres | Chartres |
| 282 | Châteaudun | Châteaudun |
| 283 | Dreux | Dreux |
| 284 | Nogent-le-Rotrou | Nogent-le-Rotrou |