| Zipcode | Community | City | State | Metro Area |
|---|---|---|---|---|
| 00638 | Ciales | Ciales | Puerto Rico | San Juan-Carolina-Caguas PR |
| 04330 | Chelsea | Augusta | Maine | Augusta-Waterville ME |
| 04619 | Calais | Calais | Maine | |
| 05038 | Chelsea | Chelsea | Vermont | Claremont-Lebanon NH-VT |
| 05648 | Calais | Calais | Vermont | Barre VT |
| 07438 | Cozy lake | Oak ridge | New Jersey | New York-Newark-Jersey City NY-NJ-PA |
| 10030 | College | New york | New York | New York-Newark-Jersey City NY-NJ-PA |
| 12512 | Chelsea | Chelsea | New York | New York-Newark-Jersey City NY-NJ-PA |
| 13131 | Colosse | Parish | New York | Syracuse NY |
| 13343 | Chase lake | Glenfield | New York | |
| 17236 | Claylick | Mercersburg | Pennsylvania | Chambersburg-Waynesboro PA |
| 17850 | Chillisquaque | Montandon | Pennsylvania | Sunbury PA |
| 17948 | Coles | Mahanoy city | Pennsylvania | Pottsville PA |
| 28734 | Cullasaja | Franklin | North Carolina | |
| 31905 | Cols | Fort benning | Georgia | Columbus GA-AL |
| 31907 | Cols | Columbus | Georgia | Columbus GA-AL |
| 31909 | Cols | Columbus | Georgia | Columbus GA-AL |
| 31914 | Cols | Columbus | Georgia | Columbus GA-AL |
| 31917 | Cols | Columbus | Georgia | Columbus GA-AL |
| 34138 | Chokoloskee | Chokoloskee | Florida | Naples-Immokalee-Marco Island FL |
| 35043 | Chelsea | Chelsea | Alabama | Birmingham-Hoover AL |
| 36254 | Choccolocco | Choccolocco | Alabama | Anniston-Oxford-Jacksonville AL |
| 38451 | Culleoka | Culleoka | Tennessee | Nashville-Davidson--Murfreesboro--Frankl |
| 38664 | Clack | Robinsonville | Mississippi | Memphis TN-MS-AR |
| 39633 | Coles | Crosby | Mississippi | McComb MS |
| 48118 | Chelsea | Chelsea | Michigan | Ann Arbor MI |
| 52215 | Chelsea | Chelsea | Iowa | |
| 54451 | Chelsea | Medford | Wisconsin | |
| 55012 | Chisago lake | Center city | Minnesota | Minneapolis-St. Paul-Bloomington MN-WI |
| 56633 | Cass lake | Cass lake | Minnesota | Brainerd MN |
| 57465 | Chelsea | Northville | South Dakota | |
| 57770 | Calico | Pine ridge | South Dakota | |
| 57785 | Clough | Sturgis | South Dakota | Rapid City SD |
| 62329 | Colusa | Colusa | Illinois | Fort Madison-Keokuk IA-IL-MO |
| 67030 | Colwich | Colwich | Kansas | Wichita KS |
| 68930 | Cowles | Blue hill | Nebraska | |
| 71433 | Calcasieu | Glenmora | Louisiana | Alexandria LA |
| 74016 | Chelsea | Chelsea | Oklahoma | Tulsa OK |
| 79248 | Chalk | Paducah | Texas | |
| 83226 | Challis | Challis | Idaho | |
| 83229 | Challis | Cobalt | Idaho | |
| 83801 | Chilco | Athol | Idaho | Coeur d'Alene ID |
| 85634 | Cowlic | Sells | Arizona | Tucson AZ |
| 87573 | Cowles | Tererro | New Mexico | Las Vegas NM |
| 95932 | Colusa | Colusa | California | |
| 98532 | Chehalis | Chehalis | Washington | Centralia WA |