| # | County | State | Population | Change since 2020 | Unemployment rate |
| 1 | Cabarrus County | North Carolina | 244,925 | 8.5 % | 3.6 % |
| 2 | Cabell County | West Virginia | 91,489 | -3.0 % | 3.9 % |
| 3 | Cache County | Utah | 145,487 | 9.3 % | 3.1 % |
| 4 | Caddo County | Oklahoma | 26,337 | -2.3 % | 3.2 % |
| 5 | Caddo Parish | Louisiana | 224,893 | -5.4 % | 4.4 % |
| 6 | Calaveras County | California | 46,505 | 2.7 % | 6.4 % |
| 7 | Calcasieu Parish | Louisiana | 206,861 | -4.6 % | 4.5 % |
| 8 | Caldwell County | North Carolina | 80,739 | 0.1 % | 3.9 % |
| 9 | Caldwell County | Texas | 52,430 | 14.3 % | 3.6 % |
| 10 | Caldwell County | Kentucky | 12,611 | -0.3 % | 4.2 % |
| 11 | Caldwell County | Missouri | 9,000 | 2.2 % | 4.2 % |
| 12 | Caldwell Parish | Louisiana | 9,393 | -2.6 % | 5.2 % |
| 13 | Caledonia County | Vermont | 30,535 | 1.0 % | 2.8 % |
| 14 | Calhoun County | Michigan | 133,785 | -0.4 % | 5.7 % |
| 15 | Calhoun County | Alabama | 116,427 | -0.0 % | 3.2 % |
| 16 | Calhoun County | Texas | 19,942 | -0.8 % | 3.7 % |
| 17 | Calhoun County | South Carolina | 14,249 | 0.9 % | 4.6 % |
| 18 | Calhoun County | Florida | 13,278 | -2.7 % | 4.4 % |
| 19 | Calhoun County | Mississippi | 12,754 | -3.8 % | 3.5 % |
| 20 | Calhoun County | Iowa | 9,711 | -2.2 % | 3.1 % |
| 21 | Calhoun County | West Virginia | 5,873 | -5.6 % | 7.1 % |
| 22 | Calhoun County | Georgia | 5,441 | -2.4 % | 3.1 % |
| 23 | Calhoun County | Arkansas | 4,690 | -1.1 % | 4.4 % |
| 24 | Calhoun County | Illinois | 4,224 | -4.7 % | 4.7 % |
| 25 | Callahan County | Texas | 14,615 | 6.6 % | 3.4 % |
| 26 | Callaway County | Missouri | 45,126 | 1.9 % | 3.4 % |
| 27 | Calloway County | Kentucky | 38,975 | 3.8 % | 5.0 % |
| 28 | Calumet County | Wisconsin | 53,602 | 2.2 % | 2.5 % |
| 29 | Calvert County | Maryland | 94,913 | 2.3 % | 3.5 % |
| 30 | Camas County | Idaho | 1,247 | 16.1 % | 3.8 % |
| 31 | Cambria County | Pennsylvania | 130,108 | -2.5 % | 5.0 % |
| 32 | Camden County | New Jersey | 533,988 | 2.0 % | 5.7 % |
| 33 | Camden County | Georgia | 59,099 | 7.9 % | 3.1 % |
| 34 | Camden County | Missouri | 44,135 | 3.3 % | 4.6 % |
| 35 | Camden County | North Carolina | 11,184 | 8.0 % | 3.0 % |
| 36 | Cameron County | Texas | 431,874 | 2.6 % | 6.9 % |
| 37 | Cameron County | Pennsylvania | 4,348 | -4.4 % | 6.4 % |
| 38 | Cameron Parish | Louisiana | 4,678 | -16.8 % | 4.5 % |
| 39 | Camp County | Texas | 13,164 | 5.6 % | 4.5 % |
| 40 | Campbell County | Kentucky | 94,008 | 1.0 % | 4.0 % |
| 41 | Campbell County | Virginia | 55,342 | -0.6 % | 3.4 % |
| 42 | Campbell County | Wyoming | 47,946 | 2.0 % | 3.3 % |
| 43 | Campbell County | Tennessee | 40,238 | 2.4 % | 3.6 % |
| 44 | Campbell County | South Dakota | 1,342 | -2.6 % | 3.6 % |
| 45 | Canadian County | Oklahoma | 181,760 | 17.9 % | 2.9 % |
| 46 | Candler County | Georgia | 11,130 | 1.3 % | 3.3 % |
| 47 | Cannon County | Tennessee | 15,142 | 4.4 % | 3.1 % |
| 48 | Canyon County | Idaho | 266,892 | 15.5 % | 3.7 % |
| 49 | Cape Girardeau County | Missouri | 83,658 | 2.4 % | 3.6 % |
| 50 | Cape May County | New Jersey | 93,875 | -1.5 % | 9.2 % |
| 51 | Capitol Planning Region | Connecticut | 991,508 | 1.4 % | 4.1 % |
| 52 | Carbon County | Pennsylvania | 65,743 | 1.5 % | 4.6 % |
| 53 | Carbon County | Utah | 20,613 | 1.0 % | 4.5 % |
| 54 | Carbon County | Wyoming | 14,250 | -1.9 % | 3.9 % |
| 55 | Carbon County | Montana | 11,498 | 9.7 % | 3.2 % |
| 56 | Caribou County | Idaho | 7,239 | 3.0 % | 3.9 % |
| 57 | Carlisle County | Kentucky | 4,777 | -0.8 % | 4.6 % |
| 58 | Carlton County | Minnesota | 36,745 | 1.5 % | 5.1 % |
| 59 | Caroline County | Maryland | 34,248 | 2.9 % | 3.9 % |
| 60 | Caroline County | Virginia | 33,477 | 8.4 % | 3.4 % |
| 61 | Carroll County | Maryland | 177,108 | 2.4 % | 3.1 % |
| 62 | Carroll County | Georgia | 129,911 | 9.0 % | 3.3 % |
| 63 | Carroll County | New Hampshire | 52,580 | 5.0 % | 2.9 % |
| 64 | Carroll County | Virginia | 29,242 | 0.3 % | 4.6 % |
| 65 | Carroll County | Tennessee | 29,107 | 2.4 % | 4.2 % |
| 66 | Carroll County | Arkansas | 28,968 | 2.5 % | 4.1 % |
| 67 | Carroll County | Ohio | 26,460 | -1.0 % | 5.1 % |
| 68 | Carroll County | Indiana | 20,747 | 2.2 % | 3.4 % |
| 69 | Carroll County | Iowa | 20,407 | -1.7 % | 2.4 % |
| 70 | Carroll County | Illinois | 15,444 | -1.7 % | 4.8 % |
| 71 | Carroll County | Kentucky | 11,111 | 2.8 % | 4.3 % |
| 72 | Carroll County | Mississippi | 9,378 | -6.3 % | 4.2 % |
| 73 | Carroll County | Missouri | 8,414 | -0.9 % | 4.3 % |
| 74 | Carson City | Nevada | 58,148 | -0.8 % | 4.2 % |
| 75 | Carson County | Texas | 5,822 | 0.4 % | 2.9 % |
| 76 | Carter County | Tennessee | 57,434 | 1.9 % | 3.9 % |
| 77 | Carter County | Oklahoma | 49,135 | 2.4 % | 4.4 % |
| 78 | Carter County | Kentucky | 26,098 | -2.0 % | 7.3 % |
| 79 | Carter County | Missouri | 5,359 | 3.0 % | 4.7 % |
| 80 | Carter County | Montana | 1,399 | -1.1 % | 1.9 % |
| 81 | Carteret County | North Carolina | 70,259 | 3.8 % | 3.5 % |
| 82 | Carver County | Minnesota | 112,628 | 5.3 % | 3.4 % |
| 83 | Cascade County | Montana | 84,523 | 0.1 % | 3.3 % |
| 84 | Casey County | Kentucky | 15,948 | 0.0 % | 5.1 % |
| 85 | Cass County | North Dakota | 200,945 | 8.9 % | 2.5 % |
| 86 | Cass County | Missouri | 113,873 | 5.6 % | 3.6 % |
| 87 | Cass County | Michigan | 51,550 | -0.1 % | 5.2 % |
| 88 | Cass County | Indiana | 37,559 | -0.8 % | 4.2 % |
| 89 | Cass County | Minnesota | 31,442 | 4.5 % | 6.3 % |
| 90 | Cass County | Texas | 28,622 | 0.6 % | 4.9 % |
| 91 | Cass County | Nebraska | 27,492 | 3.4 % | 3.1 % |
| 92 | Cass County | Iowa | 13,024 | -0.8 % | 3.2 % |
| 93 | Cass County | Illinois | 12,713 | -2.5 % | 4.6 % |
| 94 | Cassia County | Idaho | 25,976 | 5.2 % | 3.2 % |
| 95 | Castro County | Texas | 7,380 | 0.1 % | 2.8 % |
| 96 | Caswell County | North Carolina | 22,363 | -1.7 % | 3.7 % |
| 97 | Catahoula Parish | Louisiana | 8,280 | -7.0 % | 5.4 % |
| 98 | Catawba County | North Carolina | 167,054 | 4.0 % | 3.7 % |
| 99 | Catoosa County | Georgia | 68,940 | 1.6 % | 3.1 % |
| 100 | Catron County | New Mexico | 3,795 | 6.0 % | 5.5 % |
| 101 | Cattaraugus County | New York | 75,475 | -2.0 % | 4.2 % |
| 102 | Cavalier County | North Dakota | 3,567 | -3.9 % | 3.2 % |
| 103 | Cayuga County | New York | 74,567 | -2.2 % | 3.7 % |
| 104 | Cecil County | Maryland | 106,305 | 2.5 % | 4.2 % |
| 105 | Cedar County | Iowa | 18,231 | -1.4 % | 3.3 % |
| 106 | Cedar County | Missouri | 15,023 | 5.9 % | 4.6 % |
| 107 | Cedar County | Nebraska | 8,262 | -1.4 % | 2.5 % |
| 108 | Centre County | Pennsylvania | 159,805 | 1.0 % | 3.3 % |
| 109 | Cerro Gordo County | Iowa | 42,493 | -1.5 % | 3.4 % |
| 110 | Chaffee County | Colorado | 20,780 | 6.7 % | 3.6 % |
| 111 | Chambers County | Texas | 56,179 | 20.7 % | 4.8 % |
| 112 | Chambers County | Alabama | 33,813 | -2.5 % | 2.6 % |
| 113 | Champaign County | Illinois | 212,374 | 2.9 % | 4.1 % |
| 114 | Champaign County | Ohio | 38,907 | 0.5 % | 4.6 % |
| 115 | Chariton County | Missouri | 7,397 | -0.2 % | 3.9 % |
| 116 | Charles City County | Virginia | 6,564 | -3.1 % | 3.6 % |
| 117 | Charles County | Maryland | 174,478 | 4.7 % | 4.2 % |
| 118 | Charles Mix County | South Dakota | 9,343 | -0.4 % | 2.1 % |
| 119 | Charleston County | South Carolina | 431,001 | 5.5 % | 3.6 % |
| 120 | Charlevoix County | Michigan | 26,105 | 0.2 % | 5.2 % |
| 121 | Charlotte County | Florida | 212,122 | 13.5 % | 4.9 % |
| 122 | Charlotte County | Virginia | 11,258 | -2.4 % | 3.9 % |
| 123 | Charlottesville city | Virginia | 44,767 | -3.8 % | 2.9 % |
| 124 | Charlton County | Georgia | 13,021 | 4.0 % | 3.5 % |
| 125 | Chase County | Nebraska | 3,764 | -3.4 % | 2.8 % |
| 126 | Chase County | Kansas | 2,507 | -2.7 % | 4.0 % |
| 127 | Chatham County | Georgia | 307,336 | 4.1 % | 2.9 % |
| 128 | Chatham County | North Carolina | 83,874 | 10.0 % | 3.3 % |
| 129 | Chattahoochee County | Georgia | 8,548 | -10.7 % | 7.3 % |
| 130 | Chattooga County | Georgia | 25,306 | 1.3 % | 4.1 % |
| 131 | Chautauqua County | New York | 124,105 | -2.8 % | 4.3 % |
| 132 | Chautauqua County | Kansas | 3,339 | -1.2 % | 4.5 % |
| 133 | Chaves County | New Mexico | 63,697 | -2.2 % | 4.1 % |
| 134 | Cheatham County | Tennessee | 42,604 | 3.9 % | 2.9 % |
| 135 | Cheboygan County | Michigan | 25,964 | 1.5 % | 9.1 % |
| 136 | Chelan County | Washington | 81,228 | 2.6 % | 4.5 % |
| 137 | Chemung County | New York | 81,115 | -3.6 % | 3.9 % |
| 138 | Chenango County | New York | 45,776 | -3.1 % | 3.6 % |
| 139 | Cherokee County | Georgia | 293,513 | 10.1 % | 2.8 % |
| 140 | Cherokee County | South Carolina | 57,770 | 2.7 % | 5.8 % |
| 141 | Cherokee County | Texas | 53,223 | 5.3 % | 4.3 % |
| 142 | Cherokee County | Oklahoma | 48,729 | 3.5 % | 3.4 % |
| 143 | Cherokee County | North Carolina | 30,373 | 5.6 % | 4.0 % |
| 144 | Cherokee County | Alabama | 26,138 | 4.6 % | 2.8 % |
| 145 | Cherokee County | Kansas | 19,133 | -1.2 % | 4.0 % |
| 146 | Cherokee County | Iowa | 11,658 | 0.0 % | 2.6 % |
| 147 | Cherry County | Nebraska | 5,558 | 1.8 % | 2.1 % |
| 148 | Chesapeake city | Virginia | 254,997 | 2.3 % | 3.3 % |
| 149 | Cheshire County | New Hampshire | 78,078 | 2.1 % | 3.0 % |
| 150 | Chester County | Pennsylvania | 560,745 | 4.9 % | 3.2 % |
| 151 | Chester County | South Carolina | 32,323 | 0.1 % | 5.7 % |
| 152 | Chester County | Tennessee | 17,876 | 3.0 % | 4.1 % |
| 153 | Chesterfield County | Virginia | 389,793 | 7.1 % | 3.2 % |
| 154 | Chesterfield County | South Carolina | 44,488 | 2.8 % | 5.1 % |
| 155 | Cheyenne County | Nebraska | 9,602 | 1.4 % | 2.8 % |
| 156 | Cheyenne County | Kansas | 2,646 | 1.2 % | 3.3 % |
| 157 | Cheyenne County | Colorado | 1,712 | -2.1 % | 2.6 % |
| 158 | Chickasaw County | Mississippi | 16,774 | -1.9 % | 4.9 % |
| 159 | Chickasaw County | Iowa | 11,719 | -2.4 % | 2.9 % |
| 160 | Chicot County | Arkansas | 9,272 | -9.2 % | 6.3 % |
| 161 | Childress County | Texas | 6,679 | 0.2 % | 2.5 % |
| 162 | Chilton County | Alabama | 47,262 | 5.0 % | 2.6 % |
| 163 | Chippewa County | Wisconsin | 67,323 | 1.5 % | 3.7 % |
| 164 | Chippewa County | Michigan | 36,253 | -1.4 % | 7.1 % |
| 165 | Chippewa County | Minnesota | 12,299 | -2.4 % | 4.4 % |
| 166 | Chisago County | Minnesota | 59,105 | 4.4 % | 4.4 % |
| 167 | Chittenden County | Vermont | 170,851 | 1.5 % | 2.2 % |
| 168 | Choctaw County | Oklahoma | 14,174 | -0.2 % | 3.5 % |
| 169 | Choctaw County | Alabama | 12,052 | -4.8 % | 4.2 % |
| 170 | Choctaw County | Mississippi | 8,091 | -1.9 % | 4.4 % |
| 171 | Chouteau County | Montana | 5,880 | -0.6 % | 2.6 % |
| 172 | Chowan County | North Carolina | 13,891 | 1.3 % | 3.5 % |
| 173 | Christian County | Missouri | 96,045 | 8.1 % | 3.5 % |
| 174 | Christian County | Kentucky | 71,006 | -2.5 % | 5.5 % |
| 175 | Christian County | Illinois | 33,247 | -2.4 % | 4.3 % |
| 176 | Chugach Census Area | Alaska | 6,604 | -7.0 % | 5.9 % |
| 177 | Churchill County | Nevada | 26,033 | 2.0 % | 4.5 % |
| 178 | Cibola County | New Mexico | 26,686 | -1.4 % | 5.5 % |
| 179 | Cimarron County | Oklahoma | 2,133 | -7.0 % | 2.5 % |
| 180 | Citrus County | Florida | 170,174 | 10.6 % | 5.8 % |
| 181 | Clackamas County | Oregon | 425,857 | 1.1 % | 4.9 % |
| 182 | Claiborne County | Tennessee | 33,070 | 3.2 % | 4.1 % |
| 183 | Claiborne County | Mississippi | 8,122 | -11.1 % | 9.0 % |
| 184 | Claiborne Parish | Louisiana | 13,537 | -4.5 % | 6.1 % |
| 185 | Clallam County | Washington | 77,958 | 1.0 % | 5.0 % |
| 186 | Clare County | Michigan | 31,405 | 1.8 % | 7.7 % |
| 187 | Clarendon County | South Carolina | 31,030 | -0.4 % | 6.1 % |
| 188 | Clarion County | Pennsylvania | 36,855 | -1.0 % | 4.4 % |
| 189 | Clark County | Nevada | 2,398,871 | 5.8 % | 5.6 % |
| 190 | Clark County | Washington | 527,269 | 4.8 % | 4.5 % |
| 191 | Clark County | Ohio | 134,985 | -0.7 % | 5.3 % |
| 192 | Clark County | Indiana | 127,479 | 5.3 % | 3.5 % |
| 193 | Clark County | Kentucky | 37,673 | 1.8 % | 4.3 % |
| 194 | Clark County | Wisconsin | 34,801 | 0.5 % | 3.0 % |
| 195 | Clark County | Arkansas | 20,920 | -2.5 % | 4.7 % |
| 196 | Clark County | Illinois | 15,076 | -2.6 % | 4.7 % |
| 197 | Clark County | Missouri | 6,623 | -0.2 % | 4.8 % |
| 198 | Clark County | South Dakota | 3,974 | 3.5 % | 2.2 % |
| 199 | Clark County | Kansas | 1,873 | -5.9 % | 3.0 % |
| 200 | Clark County | Idaho | 794 | 0.5 % | 4.1 % |
| 201 | Clarke County | Georgia | 129,995 | 1.0 % | 3.3 % |
| 202 | Clarke County | Alabama | 22,142 | -4.1 % | 4.9 % |
| 203 | Clarke County | Virginia | 15,598 | 5.5 % | 3.1 % |
| 204 | Clarke County | Mississippi | 15,155 | -2.9 % | 4.1 % |
| 205 | Clarke County | Iowa | 9,524 | -2.3 % | 3.2 % |
| 206 | Clatsop County | Oregon | 41,043 | -0.1 % | 5.1 % |
| 207 | Clay County | Missouri | 263,370 | 4.0 % | 3.8 % |
| 208 | Clay County | Florida | 236,760 | 8.5 % | 4.1 % |
| 209 | Clay County | Minnesota | 66,848 | 2.3 % | 3.4 % |
| 210 | Clay County | Indiana | 26,424 | -0.1 % | 3.6 % |
| 211 | Clay County | Kentucky | 19,592 | -3.7 % | 6.4 % |
| 212 | Clay County | Mississippi | 18,213 | -2.2 % | 4.6 % |
| 213 | Clay County | Iowa | 16,474 | 0.6 % | 3.2 % |
| 214 | Clay County | South Dakota | 15,245 | 1.8 % | 2.1 % |
| 215 | Clay County | Alabama | 14,239 | 0.0 % | 2.8 % |
| 216 | Clay County | Arkansas | 14,112 | -3.0 % | 4.4 % |
| 217 | Clay County | Illinois | 12,821 | -3.5 % | 5.0 % |
| 218 | Clay County | North Carolina | 12,042 | 8.6 % | 3.7 % |
| 219 | Clay County | Texas | 10,730 | 5.0 % | 3.8 % |
| 220 | Clay County | Kansas | 7,969 | -1.8 % | 3.5 % |
| 221 | Clay County | Tennessee | 7,857 | 3.6 % | 4.6 % |
| 222 | Clay County | West Virginia | 7,689 | -4.5 % | 7.7 % |
| 223 | Clay County | Nebraska | 6,103 | -0.1 % | 2.9 % |
| 224 | Clay County | Georgia | 2,815 | -1.1 % | 6.1 % |
| 225 | Clayton County | Georgia | 297,703 | -0.6 % | 4.4 % |
| 226 | Clayton County | Iowa | 16,931 | -0.7 % | 4.3 % |
| 227 | Clear Creek County | Colorado | 9,076 | -3.0 % | 3.6 % |
| 228 | Clearfield County | Pennsylvania | 78,132 | -3.0 % | 4.6 % |
| 229 | Clearwater County | Idaho | 9,151 | 4.8 % | 6.4 % |
| 230 | Clearwater County | Minnesota | 8,630 | 1.4 % | 8.6 % |
| 231 | Cleburne County | Arkansas | 25,646 | 3.7 % | 4.7 % |
| 232 | Cleburne County | Alabama | 15,905 | 5.6 % | 2.6 % |
| 233 | Clermont County | Ohio | 214,123 | 2.7 % | 4.4 % |
| 234 | Cleveland County | Oklahoma | 303,952 | 2.8 % | 3.0 % |
| 235 | Cleveland County | North Carolina | 102,194 | 2.7 % | 4.4 % |
| 236 | Cleveland County | Arkansas | 7,367 | -2.4 % | 4.5 % |
| 237 | Clinch County | Georgia | 6,871 | 1.9 % | 3.8 % |
| 238 | Clinton County | Michigan | 80,050 | 1.2 % | 4.2 % |
| 239 | Clinton County | New York | 77,871 | -2.5 % | 4.1 % |
| 240 | Clinton County | Iowa | 46,015 | -1.0 % | 4.5 % |
| 241 | Clinton County | Ohio | 42,019 | -0.0 % | 4.3 % |
| 242 | Clinton County | Pennsylvania | 37,865 | 1.1 % | 4.8 % |
| 243 | Clinton County | Illinois | 37,087 | 0.5 % | 3.3 % |
| 244 | Clinton County | Indiana | 32,895 | -0.9 % | 3.2 % |
| 245 | Clinton County | Missouri | 21,721 | 2.5 % | 4.1 % |
| 246 | Clinton County | Kentucky | 9,183 | -0.7 % | 5.4 % |
| 247 | Cloud County | Kansas | 8,723 | -3.5 % | 3.3 % |
| 248 | Coahoma County | Mississippi | 20,105 | -6.0 % | 6.8 % |
| 249 | Coal County | Oklahoma | 5,414 | 2.8 % | 4.3 % |
| 250 | Cobb County | Georgia | 787,538 | 2.8 % | 3.2 % |
| 251 | Cochise County | Arizona | 125,773 | 0.3 % | 5.2 % |
| 252 | Cochran County | Texas | 2,583 | 1.3 % | 3.9 % |
| 253 | Cocke County | Tennessee | 37,596 | 4.4 % | 5.1 % |
| 254 | Coconino County | Arizona | 145,161 | 0.0 % | 4.7 % |
| 255 | Codington County | South Dakota | 29,278 | 3.4 % | 2.0 % |
| 256 | Coffee County | Tennessee | 61,285 | 5.9 % | 3.6 % |
| 257 | Coffee County | Alabama | 56,358 | 5.4 % | 2.7 % |
| 258 | Coffee County | Georgia | 43,851 | 1.8 % | 3.9 % |
| 259 | Coffey County | Kansas | 8,301 | -0.7 % | 4.4 % |
| 260 | Coke County | Texas | 3,396 | 2.8 % | 3.3 % |
| 261 | Colbert County | Alabama | 58,785 | 2.7 % | 3.2 % |
| 262 | Cole County | Missouri | 77,625 | 0.5 % | 3.2 % |
| 263 | Coleman County | Texas | 7,990 | 4.0 % | 3.5 % |
| 264 | Coles County | Illinois | 46,423 | -1.6 % | 3.8 % |
| 265 | Colfax County | New Mexico | 12,307 | -0.6 % | 4.5 % |
| 266 | Colfax County | Nebraska | 10,826 | 2.3 % | 2.8 % |
| 267 | Colleton County | South Carolina | 39,259 | 1.7 % | 5.2 % |
| 268 | Collier County | Florida | 416,233 | 10.8 % | 4.1 % |
| 269 | Collin County | Texas | 1,254,658 | 17.7 % | 3.9 % |
| 270 | Collingsworth County | Texas | 2,611 | -1.6 % | 3.2 % |
| 271 | Colonial Heights city | Virginia | 18,674 | 2.9 % | 3.4 % |
| 272 | Colorado County | Texas | 21,475 | 4.0 % | 3.7 % |
| 273 | Colquitt County | Georgia | 46,977 | 2.3 % | 3.1 % |
| 274 | Columbia County | Georgia | 167,472 | 7.3 % | 3.2 % |
| 275 | Columbia County | Florida | 73,977 | 6.1 % | 4.7 % |
| 276 | Columbia County | Pennsylvania | 66,012 | 2.0 % | 5.0 % |
| 277 | Columbia County | New York | 60,299 | -2.1 % | 3.3 % |
| 278 | Columbia County | Wisconsin | 58,113 | -0.6 % | 3.0 % |
| 279 | Columbia County | Oregon | 54,063 | 2.8 % | 6.0 % |
| 280 | Columbia County | Arkansas | 22,024 | -3.4 % | 4.8 % |
| 281 | Columbia County | Washington | 4,025 | 1.8 % | 4.2 % |
| 282 | Columbiana County | Ohio | 99,823 | -2.0 % | 5.3 % |
| 283 | Columbus County | North Carolina | 50,054 | -1.1 % | 4.3 % |
| 284 | Colusa County | California | 22,074 | 1.1 % | 13.9 % |
| 285 | Comal County | Texas | 201,628 | 24.9 % | 3.7 % |
| 286 | Comanche County | Oklahoma | 121,396 | 0.2 % | 3.8 % |
| 287 | Comanche County | Texas | 14,359 | 5.7 % | 3.2 % |
| 288 | Comanche County | Kansas | 1,694 | 0.3 % | 3.1 % |
| 289 | Concho County | Texas | 3,326 | 0.8 % | 3.4 % |
| 290 | Concordia Parish | Louisiana | 17,797 | -4.7 % | 6.3 % |
| 291 | Conecuh County | Alabama | 11,109 | -4.2 % | 4.1 % |
| 292 | Conejos County | Colorado | 7,549 | 1.2 % | 4.1 % |
| 293 | Contra Costa County | California | 1,172,607 | 0.6 % | 4.8 % |
| 294 | Converse County | Wyoming | 13,766 | 0.1 % | 3.1 % |
| 295 | Conway County | Arkansas | 21,422 | 3.4 % | 4.3 % |
| 296 | Cook County | Illinois | 5,182,617 | -1.8 % | 4.8 % |
| 297 | Cook County | Georgia | 17,984 | 4.4 % | 3.4 % |
| 298 | Cook County | Minnesota | 5,571 | -0.6 % | 4.9 % |
| 299 | Cooke County | Texas | 44,258 | 6.2 % | 3.7 % |
| 300 | Cooper County | Missouri | 17,122 | 0.1 % | 3.7 % |
| 301 | Coos County | Oregon | 64,326 | -0.9 % | 5.8 % |
| 302 | Coos County | New Hampshire | 31,094 | -0.5 % | 3.2 % |
| 303 | Coosa County | Alabama | 10,291 | -0.8 % | 3.0 % |
| 304 | Copiah County | Mississippi | 27,536 | -2.9 % | 4.0 % |
| 305 | Copper River Census Area | Alaska | 2,631 | 0.6 % | 7.9 % |
| 306 | Corson County | South Dakota | 3,747 | -3.8 % | 4.1 % |
| 307 | Cortland County | New York | 45,945 | -1.8 % | 4.3 % |
| 308 | Coryell County | Texas | 86,370 | 4.0 % | 4.7 % |
| 309 | Coshocton County | Ohio | 37,003 | 1.1 % | 5.2 % |
| 310 | Costilla County | Colorado | 3,686 | 5.4 % | 6.9 % |
| 311 | Cottle County | Texas | 1,263 | -8.5 % | 2.4 % |
| 312 | Cotton County | Oklahoma | 5,503 | -0.4 % | 3.0 % |
| 313 | Cottonwood County | Minnesota | 11,338 | -1.5 % | 4.7 % |
| 314 | Covington city | Virginia | 5,663 | -1.4 % | 4.7 % |
| 315 | Covington County | Alabama | 37,748 | 0.5 % | 2.9 % |
| 316 | Covington County | Mississippi | 18,015 | -1.8 % | 3.8 % |
| 317 | Coweta County | Georgia | 158,233 | 8.3 % | 3.1 % |
| 318 | Cowley County | Kansas | 34,186 | -1.1 % | 4.2 % |
| 319 | Cowlitz County | Washington | 113,982 | 2.9 % | 5.3 % |
| 320 | Craig County | Oklahoma | 14,506 | 2.8 % | 3.5 % |
| 321 | Craig County | Virginia | 4,829 | -1.4 % | 3.6 % |
| 322 | Craighead County | Arkansas | 115,852 | 4.1 % | 4.0 % |
| 323 | Crane County | Texas | 4,594 | -1.8 % | 2.6 % |
| 324 | Craven County | North Carolina | 104,167 | 3.4 % | 3.9 % |
| 325 | Crawford County | Pennsylvania | 82,089 | -2.2 % | 4.4 % |
| 326 | Crawford County | Arkansas | 62,258 | 3.5 % | 4.3 % |
| 327 | Crawford County | Ohio | 41,626 | -0.9 % | 5.3 % |
| 328 | Crawford County | Kansas | 38,904 | -0.2 % | 4.6 % |
| 329 | Crawford County | Missouri | 22,808 | -1.1 % | 4.6 % |
| 330 | Crawford County | Illinois | 18,388 | -1.5 % | 3.9 % |
| 331 | Crawford County | Iowa | 16,378 | -0.9 % | 4.6 % |
| 332 | Crawford County | Wisconsin | 16,008 | -0.6 % | 4.1 % |
| 333 | Crawford County | Michigan | 13,599 | 4.7 % | 7.2 % |
| 334 | Crawford County | Georgia | 12,349 | 1.8 % | 3.5 % |
| 335 | Crawford County | Indiana | 10,523 | -0.0 % | 4.4 % |
| 336 | Creek County | Oklahoma | 73,971 | 3.1 % | 3.5 % |
| 337 | Crenshaw County | Alabama | 13,114 | -0.7 % | 3.0 % |
| 338 | Crisp County | Georgia | 19,468 | -3.3 % | 3.3 % |
| 339 | Crittenden County | Arkansas | 46,633 | -3.2 % | 5.6 % |
| 340 | Crittenden County | Kentucky | 8,982 | -0.1 % | 4.9 % |
| 341 | Crockett County | Tennessee | 13,973 | 0.5 % | 3.6 % |
| 342 | Crockett County | Texas | 2,799 | -9.6 % | 3.3 % |
| 343 | Crook County | Oregon | 27,336 | 10.5 % | 5.8 % |
| 344 | Crook County | Wyoming | 7,775 | 8.3 % | 2.9 % |
| 345 | Crosby County | Texas | 5,030 | -1.9 % | 4.2 % |
| 346 | Cross County | Arkansas | 16,194 | -3.8 % | 4.4 % |
| 347 | Crow Wing County | Minnesota | 68,642 | 3.8 % | 4.8 % |
| 348 | Crowley County | Colorado | 5,600 | -5.4 % | 3.9 % |
| 349 | Culberson County | Texas | 2,254 | 3.1 % | 3.8 % |
| 350 | Cullman County | Alabama | 92,604 | 5.4 % | 2.5 % |
| 351 | Culpeper County | Virginia | 56,125 | 6.8 % | 3.1 % |
| 352 | Cumberland County | North Carolina | 338,430 | 1.1 % | 4.8 % |
| 353 | Cumberland County | Maine | 313,809 | 3.5 % | 2.7 % |
| 354 | Cumberland County | Pennsylvania | 275,516 | 6.2 % | 3.5 % |
| 355 | Cumberland County | New Jersey | 155,678 | 1.0 % | 8.1 % |
| 356 | Cumberland County | Tennessee | 65,618 | 7.3 % | 4.5 % |
| 357 | Cumberland County | Illinois | 10,305 | -1.5 % | 3.5 % |
| 358 | Cumberland County | Virginia | 10,062 | 3.8 % | 3.0 % |
| 359 | Cumberland County | Kentucky | 6,047 | 2.7 % | 4.3 % |
| 360 | Cuming County | Nebraska | 8,952 | -0.7 % | 2.2 % |
| 361 | Currituck County | North Carolina | 32,278 | 14.9 % | 2.9 % |
| 362 | Curry County | New Mexico | 47,156 | -2.6 % | 3.4 % |
| 363 | Curry County | Oregon | 22,774 | -2.9 % | 6.4 % |
| 364 | Custer County | Oklahoma | 28,266 | -0.9 % | 2.7 % |
| 365 | Custer County | Montana | 11,964 | 0.8 % | 2.8 % |
| 366 | Custer County | Nebraska | 10,487 | -0.5 % | 2.4 % |
| 367 | Custer County | South Dakota | 9,330 | 12.1 % | 2.4 % |
| 368 | Custer County | Colorado | 5,553 | 17.9 % | 3.7 % |
| 369 | Custer County | Idaho | 4,597 | 7.5 % | 4.8 % |
| 370 | Cuyahoga County | Ohio | 1,240,594 | -1.9 % | 4.1 % |