| Code | Name | Region |
|---|---|---|
| USCKH | Cheriton | VA |
| USKCN | Chernofski | AK |
| USCKG | Cherokee | AL |
| USCKK | Cherokee | AR |
| USCKE | Cherokee | IA |
| USCKA | Cherokee | OK |
| USCKF | Cherokee Falls | SC |
| USZXV | Cherokee Village | AR |
| USKYC | Chavies | KY |
| USDHY | Chazy | NY |
| USCSB | Chebanse | IL |
| US8CI | Chebeague Island | ME |
| USCHG | Cheboygan | MI |
| USC3H | Checotah | OK |
| US4CK | Cheek | TX |
| USCKT | Cheektowaga | NY |
| USCYF | Chefornak | AK |
| USCLS | Chehalis | WA |
| USXDV | Chelan | WA |
| USFCQ | Chelan Falls | WA |
| USCMD | Chelmsford | MA |
| USYSC | Chelsea | AL |
| USC67 | Chelsea | IA |
| USCZS | Chelsea | MA |
| USVHA | Chelsea | ME |
| USICS | Chelsea | MI |
| USQCS | Chelsea | NY |
| USCS5 | Chelsea | OK |
| USCA3 | Chatham | MA |
| USCH8 | Chatham | NJ |
| USCIF | Chatham | NY |
| USUHH | Chatham | PA |
| USCWM | Chatham | VA |
| USKCM | Chatom | AL |
| USCWH | Chatsworth | CA |
| USXDT | Chatsworth | GA |
| US4CI | Chatsworth | IA |
| USTS4 | Chatsworth | IL |
| US7CW | Chatsworth | NJ |
| USCTE | Chattahoochee | FL |
| USC9T | Chattahoochee | GA |
| USHH5 | Chattahoochee Hills | GA |
| USZB5 | Chattanooga | OH |
| USC6A | Chattanooga | OK |
| USCHA | Chattanooga | TN |
| USYXX | Chattaroy | WA |
| USQCQ | Chautauqua | NY |
| USKCV | Chauvin | LA |
| USCRQ | Charlotte | MI |
| USCLT | Charlotte | NC |