15 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 68048 | Plattsmouth | 13,833 |
| 68037 | Louisville | 2,471 |
| 68347 | Eagle | 2,209 |
| 68463 | Weeping Water | 1,667 |
| 68349 | Elmwood | 1,247 |
| 68366 | Greenwood | 943 |
| 68407 | Murdock | 863 |
| 68455 | Union | 844 |
| 68409 | Murray | 656 |
| 68413 | Nehawka | 477 |
| 68016 | Cedar Creek | 415 |
| 68304 | Alvo | 412 |
| 68307 | Avoca | 391 |
| 68058 | South Bend | 352 |
| 68403 | Manley | 209 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 15 ZCTAs in Cass County, Nebraska (US Census).