The canton Pontoise has 31 communes.
| Code | Name | Population ▼ |
|---|---|---|
| 95500 | Pontoise | 31 970 |
| 95370 | Marines | 3 594 |
| 95211 | Ennery | 2 243 |
| 95078 | Boissy-l'Aillerie | 2 120 |
| 95142 | Chars | 2 006 |
| 95625 | Us | 1 374 |
| 95177 | Cormeilles-en-Vexin | 1 297 |
| 95002 | Ableiges | 1 108 |
| 95459 | Nucourt | 719 |
| 95287 | Grisy-les-Plâtres | 709 |
| 95584 | Santeuil | 658 |
| 95169 | Commeny | 646 |
| 95627 | Vallangoujard | 625 |
| 95023 | Arronville | 618 |
| 95213 | Épiais-Rhus | 603 |
| 95298 | Haravilliers | 589 |
| 95254 | Frémécourt | 526 |
| 95271 | Génicourt | 514 |
| 95483 | Le Perchay | 504 |
| 95102 | Bréançon | 432 |
| 95341 | Livilliers | 389 |
| 95059 | Berville | 374 |
| 95422 | Montgeroult | 361 |
| 95181 | Courcelles-sur-Viosne | 310 |
| 95110 | Brignancourt | 262 |
| 95447 | Neuilly-en-Vexin | 240 |
| 95054 | Le Bellay-en-Vexin | 224 |
| 95303 | Le Heaulme | 207 |
| 95438 | Moussy | 108 |
| 95387 | Menouville | 62 |
| 95611 | Theuville | 53 |