15 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 68048 | Plattsmouth | 13,435 |
| 68037 | Louisville | 2,524 |
| 68347 | Eagle | 2,508 |
| 68463 | Weeping Water | 1,831 |
| 68349 | Elmwood | 1,224 |
| 68366 | Greenwood | 957 |
| 68407 | Murdock | 878 |
| 68455 | Union | 852 |
| 68409 | Murray | 625 |
| 68413 | Nehawka | 558 |
| 68016 | Cedar Creek | 427 |
| 68304 | Alvo | 414 |
| 68058 | South Bend | 378 |
| 68307 | Avoca | 336 |
| 68403 | Manley | 206 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 15 ZCTAs in Cass County, Nebraska (US Census).