| Zipcode | Community | City | State | Metro Area |
|---|---|---|---|---|
| 04657 | Cooper | Meddybemps | Maine | |
| 28401 | Cape fear | Wilmington | North Carolina | Wilmington NC |
| 50059 | Cooper | Cooper | Iowa | |
| 54511 | Cavour | Argonne | Wisconsin | |
| 57324 | Cavour | Cavour | South Dakota | Huron SD |
| 57626 | Cooper | Faith | South Dakota | Rapid City SD |
| 60919 | Cabery | Cabery | Illinois | Champaign-Urbana IL |
| 65624 | Cape fair | Cape fair | Missouri | Branson MO |
| 75432 | Cooper | Cooper | Texas | |
| 82601 | Casper | Casper | Wyoming | Casper WY |
| 82602 | Casper | Casper | Wyoming | Casper WY |
| 82604 | Casper | Casper | Wyoming | Casper WY |
| 82605 | Casper | Casper | Wyoming | Casper WY |
| 82609 | Casper | Casper | Wyoming | Casper WY |
| 82615 | Casper | Shirley basin | Wyoming | |
| 82630 | Casper | Arminto | Wyoming | Casper WY |
| 82638 | Casper | Hiland | Wyoming | Casper WY |
| 82646 | Casper | Natrona | Wyoming | Casper WY |
| 87014 | Cubero | Cubero | New Mexico | Grants NM |
| 89835 | Cobre | Wells | Nevada | Elko NV |
| 95420 | Caspar | Caspar | California | Ukiah CA |