85 communes composent la zone d'emploi de Cergy.
| nom commune | pop. | code insee | code postal |
|---|---|---|---|
| Ableiges | 1109 | 95002 | 95450 |
| Ambleville | 390 | 95011 | 95710 |
| Arronville | 619 | 95023 | 95810 |
| Arthies | 267 | 95024 | 95420 |
| Auvers-sur-Oise | 6820 | 95039 | 95430 |
| Avernes | 866 | 95040 | 95450 |
| Banthelu | 148 | 95046 | 95420 |
| Beauchamp | 9506 | 95051 | 95250 |
| Berville | 370 | 95059 | 95810 |
| Bessancourt | 8521 | 95060 | 95550 |
| Boisemont | 883 | 95074 | 95000 |
| Boissy-l'Aillerie | 2114 | 95078 | 95650 |
| Bray-et-Lû | 957 | 95101 | 95710 |
| Bréançon | 425 | 95102 | 95640 |
| Brignancourt | 243 | 95110 | 95640 |
| Buhy | 327 | 95119 | 95770 |
| Cergy | 69578 | 95127 | 95000 |
| Charmont | 33 | 95141 | 95420 |
| Chars | 2017 | 95142 | 95750 |
| Chaussy | 634 | 95150 | 95710 |
| Cléry-en-Vexin | 467 | 95166 | 95420 |
| Commeny | 648 | 95169 | 95450 |
| Condécourt | 557 | 95170 | 95450 |
| Cormeilles-en-Vexin | 1294 | 95177 | 95830 |
| Courcelles-sur-Viosne | 307 | 95181 | 95650 |
| Courdimanche | 7111 | 95183 | 95800 |
| Ennery | 2313 | 95211 | 95300 |
| Épiais-Rhus | 607 | 95213 | 95810 |
| Éragny | 18723 | 95218 | 95610 |
| Frémainville | 502 | 95253 | 95450 |
| Frémécourt | 535 | 95254 | 95830 |
| Frépillon | 3327 | 95256 | 95740 |
| Frouville | 347 | 95258 | 95690 |
| Gadancourt | 0 | 95259 | - |
| Genainville | 521 | 95270 | 95420 |
| Génicourt | 515 | 95271 | 95650 |
| Gouzangrez | 0 | 95282 | - |
| Grisy-les-Plâtres | 706 | 95287 | 95810 |
| Guiry-en-Vexin | 151 | 95295 | 95450 |
| Haravilliers | 582 | 95298 | 95640 |
| Hédouville | 280 | 95304 | 95690 |
| Herblay | 31818 | 95306 | 95220 |
| Hérouville | 569 | 95308 | 95300 |
| Hodent | 225 | 95309 | 95420 |
| Jouy-le-Moutier | 17411 | 95323 | 95280 |
| La Chapelle-en-Vexin | 316 | 95139 | 95420 |
| La Frette-sur-Seine | 4587 | 95257 | 95530 |
| Labbeville | 641 | 95328 | 95690 |
| Le Bellay-en-Vexin | 219 | 95054 | 95750 |
| Le Heaulme | 206 | 95303 | 95640 |
| Le Perchay | 513 | 95483 | 95450 |
| Livilliers | 386 | 95341 | 95300 |
| Longuesse | 505 | 95348 | 95450 |
| Magny-en-Vexin | 5755 | 95355 | 95420 |
| Marines | 3508 | 95370 | 95640 |
| Maudétour-en-Vexin | 203 | 95379 | 95420 |
| Menouville | 62 | 95387 | 95810 |
| Menucourt | 6189 | 95388 | 95180 |
| Méry-sur-Oise | 10015 | 95394 | 95540 |
| Montgeroult | 350 | 95422 | 95650 |
| Montigny-lès-Cormeilles | 22390 | 95424 | 95370 |
| Montreuil-sur-Epte | 382 | 95429 | 95770 |
| Moussy | 111 | 95438 | 95640 |
| Neuilly-en-Vexin | 238 | 95447 | 95640 |
| Neuville-sur-Oise | 2089 | 95450 | 95000 |
| Nucourt | 719 | 95459 | 95420 |
| Omerville | 325 | 95462 | 95420 |
| Osny | 17471 | 95476 | 95520 |
| Pierrelaye | 10230 | 95488 | 95220 |
| Pontoise | 31623 | 95500 | 95000 |
| Puiseux-Pontoise | 593 | 95510 | 95650 |
| Sagy | 1100 | 95535 | 95450 |
| Saint-Clair-sur-Epte | 979 | 95541 | 95770 |
| Saint-Gervais | 883 | 95554 | 95420 |
| Saint-Ouen-l'Aumône | 25614 | 95572 | 95310 |
| Santeuil | 660 | 95584 | 95640 |
| Seraincourt | 1310 | 95592 | 95450 |
| Taverny | 27065 | 95607 | 95150 |
| Théméricourt | 289 | 95610 | 95450 |
| Theuville | 53 | 95611 | 95810 |
| Us | 1331 | 95625 | 95450 |
| Vallangoujard | 616 | 95627 | 95810 |
| Vauréal | 16079 | 95637 | 95490 |
| Vigny | 1132 | 95658 | 95450 |
| Wy-dit-Joli-Village | 329 | 95690 | 95420 |
La zone d'emploi de Cergy est composée de 85 communes pour une population de 392409 habitants.