The canton Jarny has 34 communes.
| Code | Name | Population ▼ |
|---|---|---|
| 54273 | Jarny | 8 050 |
| 54263 | Homécourt | 6 254 |
| 54028 | Auboué | 2 650 |
| 54136 | Conflans-en-Jarnisy | 2 389 |
| 54542 | Valleroy | 2 375 |
| 54391 | Moutiers | 1 602 |
| 54286 | Labry | 1 554 |
| 54227 | Giraumont | 1 380 |
| 54051 | Batilly | 1 313 |
| 54371 | Moineville | 1 114 |
| 54171 | Doncourt-lès-Conflans | 1 110 |
| 54353 | Mars-la-Tour | 875 |
| 54253 | Hatrize | 838 |
| 54112 | Chambley-Bussières | 729 |
| 54469 | Saint-Ail | 465 |
| 54277 | Jeandelize | 375 |
| 54213 | Friauville | 364 |
| 54581 | Ville-sur-Yron | 293 |
| 54283 | Jouaville | 274 |
| 54249 | Hannonville-Suzémont | 262 |
| 54441 | Puxieux | 221 |
| 54408 | Olley | 220 |
| 54103 | Bruville | 217 |
| 54535 | Tronville | 200 |
| 54082 | Boncourt | 179 |
| 54093 | Brainville | 167 |
| 54477 | Saint-Julien-lès-Gorze | 162 |
| 54009 | Allamont | 156 |
| 54478 | Saint-Marcel | 150 |
| 54244 | Hagéville | 111 |
| 54511 | Sponville | 108 |
| 54599 | Xonville | 108 |
| 54440 | Puxe | 107 |
| 54153 | Dampvitoux | 55 |