| Carroll | 28,000 | Berryville | Arkansas | Springfield, MO | View → |
| Carroll | 10,000 | Carrollton | Mississippi | Tupelo-Meridian-Greenwood, MS | View → |
| Carson | 6,200 | Panhandle | Texas | Amarillo, TX | View → |
| Carson City | 58,475 | Carson City | Nevada | Las Vegas-Reno, NV | View → |
| Carter | 27,000 | Grayson | Kentucky | Charleston-Bluefield, WV | View → |
| Carter | 1,200 | Ekalaka | Montana | Missoula-Billings-Butte, MT | View → |
| Carter | 6,200 | Van Buren | Missouri | Paducah, KY | View → |
| Carter | 49,000 | Ardmore | Oklahoma | Sherman, TX | View → |
| Carter | 57,000 | Elizabethton | Tennessee | Tri-Cities, TN/VA | View → |
| Carteret | 71,000 | Morehead City | North Carolina | Raleigh-Greenville-Wilmington, NC | View → |
| Carver | 108,000 | Chaska | Minnesota | Minneapolis-St. Paul, MN | View → |
| Cascade | 82,000 | Great Falls | Montana | Missoula-Billings-Butte, MT | View → |
| Casey | 16,000 | Liberty | Kentucky | Lexington-Bowling Green, KY | View → |
| Cass | 12,000 | Virginia | Illinois | Champaign-Peoria, IL | View → |
| Cass | 51,000 | Dowagiac | Michigan | Chicago, IL | View → |
| Cass | 195,000 | Fargo | North Dakota | Fargo, ND | View → |
| Cass | 37,500 | Logansport | Indiana | Indianapolis-Fort Wayne, IN | View → |
| Cass | 105,000 | Harrisonville | Missouri | Kansas City, MO | View → |
| Cass | 30,000 | Walker | Minnesota | Minneapolis-St. Paul, MN | View → |
| Cass | 12,800 | Atlantic | Iowa | Omaha, NE-Sioux City, IA | View → |
| Cass | 26,000 | Plattsmouth | Nebraska | Omaha, NE-Sioux City, IA | View → |
| Cass | 30,300 | Atlanta | Texas | Shreveport, LA | View → |
| Cassia | 25,000 | Burley | Idaho | Boise-Pocatello, ID | View → |
| Castro | 7,700 | Dimmitt | Texas | Amarillo, TX | View → |
| Caswell | 23,000 | Yanceyville | North Carolina | Charlotte-Greensboro, NC | View → |
| Catahoula | 9,500 | Harrisonburg | Louisiana | Jackson, MS | View → |
| Catawba | 160,000 | Hickory | North Carolina | Charlotte-Greensboro, NC | View → |
| Catoosa | 67,000 | Ringgold | Georgia | Knoxville-Chattanooga, TN | View → |
| Catron | 3,500 | Reserve | New Mexico | Albuquerque, NM | View → |
| Cattaraugus | 76,000 | Olean | New York | Buffalo-Rochester-Syracuse, NY | View → |
| Cavalier | 3,800 | Langdon | North Dakota | Fargo, ND | View → |
| Cayuga | 75,000 | Auburn | New York | Buffalo-Rochester-Syracuse, NY | View → |
| Cecil | 105,000 | Elkton | Maryland | Baltimore, MD | View → |
| Cedar | 18,000 | Tipton | Iowa | Cedar Rapids, IA | View → |
| Cedar | 8,400 | Hartington | Nebraska | Omaha, NE-Sioux City, IA | View → |
| Cedar | 14,000 | El Dorado Springs | Missouri | Springfield, MO | View → |
| Centre | 165,000 | State College | Pennsylvania | Johnstown-Altoona-State College, PA | View → |
| Cerro Gordo | 43,000 | Mason City | Iowa | Cedar Rapids, IA | View → |
| Chaffee | 21,000 | Salida | Colorado | Denver-Colorado Springs, CO | View → |
| Chambers | 50,000 | Anahuac | Texas | Houston, TX | View → |
| Chambers | 34,800 | Valley | Alabama | Macon-Columbus, GA | View → |
| Champaign | 220,000 | Champaign | Illinois | Champaign-Peoria, IL | View → |
| Champaign | 38,800 | Urbana | Ohio | Cincinnati-Dayton, OH | View → |
| Chariton | 7,600 | Salisbury | Missouri | Kansas City, MO | View → |
| Charles | 165,000 | Waldorf | Maryland | Washington, DC | View → |
| Charles City | 7,000 | Charles City | Virginia | Richmond, VA | View → |
| Charles Mix | 9,100 | Lake Andes | South Dakota | Sioux Falls-Rapid City, SD | View → |
| Charleston | 424,367 | Charleston | South Carolina | Charleston-Florence, SC | View → |
| Charlevoix | 27,000 | Charlevoix | Michigan | Traverse City, MI | View → |
| Charlotte | 12,000 | Charlotte Court House | Virginia | Roanoke-Harrisonburg, VA | View → |
