This department has 610 communes.
| Code | Name | Population |
|---|---|---|
| 51454 | Reims | 177 674 |
| 51108 | Châlons-en-Champagne | 42 971 |
| 51230 | Épernay | 22 174 |
| 51649 | Vitry-le-François | 10 996 |
| 51573 | Tinqueux | 10 771 |
This department has 26 cantons.
This department has 4 departmental arrondissements.
| Code | Name | Administrative seat |
|---|---|---|
| 511 | Châlons-en-Champagne | Châlons-en-Champagne |
| 512 | Épernay | Épernay |
| 513 | Reims | Reims |
| 514 | Vitry-le-François | Vitry-le-François |