| Champaign | 220,000 | Champaign | Illinois | Champaign-Peoria, IL | View → |
| Champaign | 38,800 | Urbana | Ohio | Cincinnati-Dayton, OH | View → |
| Charleston | 424,367 | Charleston | South Carolina | Charleston-Florence, SC | View → |
| Chattooga | 26,000 | Summerville | Georgia | Atlanta, GA | View → |
| Chautauqua | 125,000 | Jamestown | New York | Buffalo-Rochester-Syracuse, NY | View → |
| Chaves | 65,000 | Roswell | New Mexico | Albuquerque, NM | View → |
| Cherokee | 270,000 | Canton | Georgia | Atlanta, GA | View → |
| Cherokee | 25,000 | Centre | Alabama | Birmingham-Huntsville, AL | View → |
| Cherokee | 55,000 | Jacksonville | Texas | Dallas-Fort Worth, TX | View → |
| Cherokee | 60,000 | Gaffney | South Carolina | Greenville, SC-Asheville, NC | View → |
| Cheshire | 77,000 | Keene | New Hampshire | Boston-Springfield, MA | View → |
| Chester | 32,000 | Chester | South Carolina | Charlotte-Greensboro, NC | View → |
| Chesterfield | 45,000 | Cheraw | South Carolina | Charlotte-Greensboro, NC | View → |
| Cheyenne | 1,800 | Cheyenne Wells | Colorado | Denver-Colorado Springs, CO | View → |
| Cheyenne | 9,000 | Sidney | Nebraska | Denver-Colorado Springs, CO | View → |
| Chickasaw | 12,000 | New Hampton | Iowa | Cedar Rapids, IA | View → |
| Childress | 7,300 | Childress | Texas | Amarillo, TX | View → |
| Chilton | 45,000 | Clanton | Alabama | Birmingham-Huntsville, AL | View → |
| Chittenden | 170,000 | Burlington | Vermont | Burlington, VT | View → |
| Christian | 33,000 | Taylorville | Illinois | Champaign-Peoria, IL | View → |
| Cibola | 26,500 | Grants | New Mexico | Albuquerque, NM | View → |
| Cimarron | 2,300 | Boise City | Oklahoma | Amarillo, TX | View → |
| Clarendon | 34,000 | Manning | South Carolina | Columbia, SC | View → |
| Clark | 1,000 | Dubois | Idaho | Boise-Pocatello, ID | View → |
| Clark | 15,500 | Marshall | Illinois | Champaign-Peoria, IL | View → |
| Clark | 136,000 | Springfield | Ohio | Cincinnati-Dayton, OH | View → |
| Clarke | 130,000 | Athens | Georgia | Atlanta, GA | View → |
| Clarke | 9,600 | Osceola | Iowa | Des Moines, IA | View → |
| Clay | 11,000 | Hayesville | North Carolina | Atlanta, GA | View → |
| Clay | 14,200 | Ashland | Alabama | Birmingham-Huntsville, AL | View → |
| Clay | 14,000 | Louisville | Illinois | Champaign-Peoria, IL | View → |
| Clay | 8,800 | Clay | West Virginia | Charleston-Bluefield, WV | View → |
| Clay | 65,000 | Moorhead | Minnesota | Fargo, ND | View → |
| Clayton | 300,000 | Jonesboro | Georgia | Atlanta, GA | View → |
| Clayton | 18,000 | Elkader | Iowa | Cedar Rapids, IA | View → |
| Clear Creek | 9,500 | Georgetown | Colorado | Denver-Colorado Springs, CO | View → |
| Clearwater | 9,000 | Bagley | Minnesota | Fargo, ND | View → |
| Cleburne | 15,100 | Heflin | Alabama | Atlanta, GA | View → |
| Clermont | 210,000 | Batavia | Ohio | Cincinnati-Dayton, OH | View → |
| Cleveland | 98,000 | Shelby | North Carolina | Charlotte-Greensboro, NC | View → |
| Clinton | 79,000 | Plattsburgh | New York | Burlington, VT | View → |
| Clinton | 41,000 | Wilmington | Ohio | Cincinnati-Dayton, OH | View → |
| Clinton | 46,000 | Clinton | Iowa | Davenport, IA-Moline, IL | View → |
| Clinton | 80,000 | St. Johns | Michigan | Grand Rapids, MI | View → |
| Cobb | 800,000 | Marietta | Georgia | Atlanta, GA | View → |
| Colbert | 57,200 | Muscle Shoals | Alabama | Birmingham-Huntsville, AL | View → |
| Coles | 51,000 | Charleston | Illinois | Champaign-Peoria, IL | View → |
| Colfax | 12,000 | Raton | New Mexico | Albuquerque, NM | View → |
| Colleton | 38,000 | Walterboro | South Carolina | Charleston-Florence, SC | View → |
| Collin | 1,200,000 | McKinney | Texas | Dallas-Fort Worth, TX | View → |
