| Zip Code | City | Population ↓ |
|---|---|---|
| 68822 | Broken Bow | 4,644 |
| 69120 | Arnold | 1,181 |
| 68825 | Callaway | 930 |
| 68814 | Ansley | 914 |
| 68874 | Sargent | 709 |
| 68856 | Merna | 704 |
| 68813 | Anselmo | 512 |
| 68855 | Mason City | 324 |
| 68860 | Oconto | 266 |
| 68828 | Comstock | 191 |
| 68881 | Westerville | 111 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 11 ZCTAs in Custer County, Nebraska (US Census).