Astuce :
| nom commune | pop. | code insee | code siren | code postal |
|---|---|---|---|---|
| Aignay-le-Duc | 263 | 21004 | 212100044 | 21510 |
| Aisey-sur-Seine | 166 | 21006 | 212100069 | 21400 |
| Ampilly-le-Sec | 329 | 21012 | 212100127 | 21400 |
| Ampilly-les-Bordes | 81 | 21011 | 212100119 | 21450 |
| Autricourt | 136 | 21034 | 212100341 | 21570 |
| Baigneux-les-Juifs | 203 | 21043 | 212100432 | 21450 |
| Balot | 93 | 21044 | 212100440 | 21330 |
| Beaulieu | 27 | 21052 | 212100523 | 21510 |
| Beaunotte | 15 | 21055 | 212100556 | 21510 |
| Belan-sur-Ource | 228 | 21058 | 212100580 | 21570 |
| Bellenod-sur-Seine | 68 | 21061 | 212100614 | 21510 |
| Beneuvre | 92 | 21063 | 212100630 | 21290 |
| Billy-lès-Chanceaux | 68 | 21075 | 212100754 | 21450 |
| Bissey-la-Côte | 132 | 21077 | 212100770 | 21520 |
| Bissey-la-Pierre | 68 | 21078 | 212100788 | 21330 |
| Boudreville | 60 | 21090 | 212100903 | 21520 |
| Bouix | 151 | 21093 | 212100937 | 21330 |
| Brémur-et-Vaurois | 44 | 21104 | 212101042 | 21400 |
| Brion-sur-Ource | 216 | 21109 | 212101091 | 21570 |
| Buncey | 358 | 21115 | 212101158 | 21400 |
| Bure-les-Templiers | 135 | 21116 | 212101166 | 21290 |
| Busseaut | 52 | 21117 | 212101174 | 21510 |
| Buxerolles | 34 | 21123 | 212101232 | 21290 |
| Cérilly | 214 | 21125 | 212101257 | 21330 |
| Chambain | 28 | 21129 | 212101299 | 21290 |
| Chamesson | 241 | 21134 | 212101349 | 21400 |
| Channay | 59 | 21143 | 212101430 | 21330 |
| Charrey-sur-Seine | 137 | 21149 | 212101497 | 21400 |
| Châtillon-sur-Seine (chef lieu) | 5404 | 21154 | 212101547 | 21400 |
| Chaugey | 24 | 21157 | 212101570 | 21290 |
| la Chaume | 97 | 21159 | 212101596 | 21520 |
| Chaume-lès-Baigneux | 105 | 21160 | 212101604 | 21450 |
| Chaumont-le-Bois | 79 | 21161 | 212101612 | 21400 |
| Chemin-d'Aisey | 63 | 21165 | 212101653 | 21400 |
| Coulmier-le-Sec | 240 | 21201 | 212102016 | 21400 |
| Courban | 140 | 21202 | 212102024 | 21520 |
| Duesme | 46 | 21235 | 212102354 | 21510 |
| Échalot | 97 | 21237 | 212102370 | 21510 |
| Essarois | 84 | 21250 | 212102503 | 21290 |
| Étalante | 128 | 21253 | 212102537 | 21510 |
| Étormay | 66 | 21257 | 212102578 | 21450 |
| Étrochey | 207 | 21258 | 212102586 | 21400 |
| Faverolles-lès-Lucey | 29 | 21262 | 212102628 | 21290 |
| Fontaines-en-Duesmois | 117 | 21276 | 212102768 | 21450 |
| Gevrolles | 167 | 21296 | 212102966 | 21520 |
| Gomméville | 116 | 21302 | 212103022 | 21400 |
| les Goulles | 17 | 21303 | 212103030 | 21520 |
| Grancey-sur-Ource | 179 | 21305 | 212103055 | 21570 |
| Griselles | 92 | 21309 | 212103097 | 21330 |
| Gurgy-la-Ville | 26 | 21312 | 212103121 | 21290 |
| Gurgy-le-Château | 45 | 21313 | 212103139 | 21290 |
| Jours-lès-Baigneux | 91 | 21326 | 212103261 | 21450 |
| Laignes | 669 | 21336 | 212103360 | 21330 |
| Larrey | 96 | 21343 | 212103436 | 21330 |
| Leuglay | 294 | 21346 | 212103469 | 21290 |
| Lignerolles | 57 | 21350 | 212103501 | 21520 |
| Louesme | 113 | 21357 | 212103576 | 21520 |
| Lucey | 56 | 21359 | 212103592 | 21290 |
| Magny-Lambert | 85 | 21364 | 212103642 | 21450 |
| Maisey-le-Duc | 75 | 21372 | 212103725 | 21400 |
| Marcenay | 98 | 21378 | 212103782 | 21330 |
| Massingy | 172 | 21393 | 212103931 | 21400 |
| Mauvilly | 65 | 21396 | 212103964 | 21510 |
| Menesble | 16 | 21402 | 212104020 | 21290 |
| Meulson | 28 | 21410 | 212104103 | 21510 |
| Minot | 188 | 21415 | 212104152 | 21510 |
| Moitron | 55 | 21418 | 212104186 | 21510 |
| Molesme | 274 | 21419 | 212104194 | 21330 |
| Montigny-sur-Aube | 255 | 21432 | 212104327 | 21520 |
| Montliot-et-Courcelles | 292 | 21435 | 212104350 | 21400 |
| Montmoyen | 72 | 21438 | 212104384 | 21290 |
| Mosson | 68 | 21444 | 212104442 | 21400 |
| Nicey | 108 | 21454 | 212104541 | 21330 |
| Nod-sur-Seine | 206 | 21455 | 212104558 | 21400 |
| Noiron-sur-Seine | 59 | 21460 | 212104608 | 21400 |
| Obtrée | 80 | 21465 | 212104657 | 21400 |
| Oigny | 40 | 21466 | 212104665 | 21450 |
| Origny | 53 | 21470 | 212104707 | 21510 |
| Orret | 12 | 21471 | 212104715 | 21450 |
| Poinçon-lès-Larrey | 193 | 21488 | 212104889 | 21330 |
| Poiseul-la-Ville-et-Laperrière | 155 | 21490 | 212104905 | 21450 |
| Pothières | 193 | 21499 | 212104996 | 21400 |
| Prusly-sur-Ource | 160 | 21510 | 212105100 | 21400 |
| Puits | 136 | 21511 | 212105118 | 21400 |
| Quemigny-sur-Seine | 95 | 21514 | 212105142 | 21510 |
| Recey-sur-Ource | 338 | 21519 | 212105191 | 21290 |
| Riel-les-Eaux | 93 | 21524 | 212105241 | 21570 |
| Rochefort-sur-Brévon | 42 | 21526 | 212105266 | 21510 |
| Saint-Broing-les-Moines | 184 | 21543 | 212105431 | 21290 |
| Saint-Germain-le-Rocheux | 83 | 21549 | 212105498 | 21510 |
| Saint-Marc-sur-Seine | 111 | 21557 | 212105571 | 21450 |
| Sainte-Colombe-sur-Seine | 919 | 21545 | 212105456 | 21400 |
| Savoisy | 195 | 21594 | 212105944 | 21500 |
| Semond | 31 | 21602 | 212106025 | 21450 |
| Terrefondrée | 65 | 21626 | 212106264 | 21290 |
| Thoires | 58 | 21628 | 212106280 | 21570 |
| Vannaire | 49 | 21653 | 212106538 | 21400 |
| Vanvey | 239 | 21655 | 212106553 | 21400 |
| Vertault | 50 | 21671 | 212106710 | 21330 |
| Veuxhaulles-sur-Aube | 210 | 21674 | 212106744 | 21520 |
| Villaines-en-Duesmois | 252 | 21685 | 212106850 | 21450 |
| Villedieu | 70 | 21693 | 212106934 | 21330 |
| Villers-Patras | 86 | 21700 | 212107007 | 21400 |
| Villiers-le-Duc | 111 | 21704 | 212107049 | 21400 |
| Villotte-sur-Ource | 106 | 21706 | 212107064 | 21400 |
| Vix | 96 | 21711 | 212107114 | 21400 |
| Voulaines-les-Templiers | 270 | 21717 | 212107171 | 21290 |
Le canton de Châtillon-sur-Seine est composé de 107 communes entières pour une population de 19533 habitants.