(Links below lead to Quick Facts for South Carolina Counties: People, Business & Geography at U.S. Census Bureau.)
| Area | 7/1/2009 | 7/1/2008 | 7/1/2007 | 7/1/2006 | 7/1/2005 | 7/1/2004 | 7/1/2003 | 7/1/2002 | 7/1/2001 | 7/1/2000 | Census 2000 |
| South Carolina | 4,561,242 | 4,503,280 | 4,424,232 | 4,339,399 | 4,256,199 | 4,201,306 | 4,146,474 | 4,103,934 | 4,062,701 | 4,023,570 | 4,012,012 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Abbeville County | 25,098 | 25,236 | 25,318 | 25,440 | 25,644 | 25,965 | 26,104 | 26,202 | 26,287 | 26,226 | 26,167 |
| Aiken County | 156,017 | 154,601 | 153,098 | 150,834 | 148,684 | 147,589 | 145,941 | 144,706 | 143,405 | 142,726 | 142,552 |
| Allendale County | 10,195 | 10,407 | 10,418 | 10,544 | 10,733 | 10,814 | 10,917 | 11,003 | 10,964 | 11,200 | 11,211 |
| Anderson County | 184,901 | 182,937 | 180,155 | 177,244 | 174,332 | 172,666 | 171,196 | 169,920 | 168,716 | 166,319 | 165,740 |
| Bamberg County | 15,005 | 15,185 | 15,394 | 15,604 | 15,734 | 15,814 | 15,955 | 16,266 | 16,408 | 16,609 | 16,658 |
| Barnwell County | 22,688 | 22,896 | 22,977 | 22,969 | 23,038 | 23,043 | 23,256 | 23,199 | 23,395 | 23,446 | 23,478 |
| Beaufort County | 155,215 | 152,164 | 147,970 | 144,190 | 139,458 | 134,926 | 131,014 | 128,547 | 124,794 | 122,077 | 120,937 |
| Berkeley County | 173,498 | 169,586 | 163,455 | 158,007 | 152,092 | 150,720 | 147,785 | 145,904 | 144,568 | 143,131 | 142,651 |
| Calhoun County | 14,621 | 14,642 | 14,778 | 14,817 | 14,874 | 14,981 | 15,121 | 15,139 | 15,261 | 15,224 | 15,185 |
| Charleston County | 355,276 | 349,778 | 344,506 | 341,425 | 337,584 | 333,122 | 325,336 | 320,050 | 314,506 | 311,047 | 309,969 |
| Cherokee County | 54,714 | 54,629 | 54,151 | 53,860 | 53,522 | 53,427 | 53,266 | 53,333 | 52,990 | 52,665 | 52,537 |
| Chester County | 32,410 | 32,732 | 32,645 | 32,658 | 32,887 | 33,240 | 33,606 | 33,873 | 33,938 | 34,111 | 34,068 |
| Chesterfield County | 43,037 | 43,072 | 42,901 | 42,658 | 42,713 | 42,700 | 42,843 | 42,990 | 42,888 | 42,836 | 42,768 |
| Clarendon County | 32,988 | 33,104 | 32,704 | 32,772 | 32,747 | 32,762 | 32,667 | 32,694 | 32,703 | 32,536 | 32,502 |
| Colleton County | 39,246 | 39,349 | 39,146 | 38,911 | 38,990 | 38,895 | 38,729 | 38,606 | 38,427 | 38,333 | 38,264 |
| Darlington County | 66,445 | 66,863 | 66,751 | 66,906 | 66,889 | 67,099 | 67,559 | 67,697 | 67,553 | 67,441 | 67,394 |
| Dillon County | 30,912 | 30,778 | 30,735 | 30,748 | 30,711 | 30,817 | 30,771 | 30,791 | 30,881 | 30,675 | 30,722 |
| Dorchester County | 130,417 | 127,830 | 124,023 | 118,187 | 111,753 | 106,254 | 103,418 | 100,589 | 98,413 | 96,697 | 96,413 |
| Edgefield County | 25,752 | 25,588 | 25,417 | 25,180 | 25,409 | 25,184 | 24,928 | 24,639 | 24,515 | 24,538 | 24,595 |
| Fairfield County | 23,343 | 23,458 | 23,298 | 23,636 | 23,677 | 23,919 | 23,654 | 23,749 | 23,580 | 23,529 | 23,454 |
| Florence County | 134,208 | 133,368 | 132,276 | 131,102 | 129,809 | 128,968 | 128,014 | 127,007 | 126,245 | 125,819 | 125,761 |
| Georgetown County | 60,703 | 60,753 | 60,354 | 59,841 | 59,525 | 59,176 | 58,378 | 57,686 | 56,788 | 56,041 | 55,797 |
| Greenville County | 451,428 | 442,635 | 431,215 | 418,555 | 407,533 | 400,858 | 395,325 | 391,087 | 386,393 | 381,124 | 379,616 |
| Greenwood County | 69,671 | 69,087 | 68,438 | 68,205 | 67,756 | 67,370 | 67,368 | 67,055 | 66,594 | 66,293 | 66,271 |
| Hampton County | 21,014 | 20,996 | 21,089 | 20,906 | 20,982 | 20,950 | 21,173 | 21,134 | 21,240 | 21,357 | 21,386 |
| Horry County | 263,868 | 258,790 | 250,904 | 240,735 | 228,708 | 218,220 | 211,086 | 206,280 | 201,918 | 198,132 | 196,629 |
| Jasper County | 23,221 | 22,746 | 22,211 | 21,762 | 21,308 | 21,034 | 20,920 | 20,873 | 20,884 | 20,707 | 20,678 |
| Kershaw County | 60,042 | 59,309 | 58,456 | 57,239 | 55,834 | 54,891 | 54,220 | 53,470 | 53,346 | 52,836 | 52,647 |
| Lancaster County | 77,767 | 75,872 | 73,498 | 71,723 | 69,763 | 68,167 | 66,502 | 64,857 | 63,100 | 61,395 | 61,351 |
| Laurens County | 70,045 | 69,938 | 69,626 | 69,486 | 69,392 | 69,246 | 69,620 | 69,724 | 69,983 | 69,690 | 69,567 |
| Lee County | 19,722 | 20,005 | 20,119 | 20,240 | 20,286 | 20,333 | 20,147 | 20,102 | 20,053 | 20,136 | 20,119 |
| Lexington County | 255,607 | 249,744 | 243,973 | 239,011 | 233,406 | 229,522 | 225,953 | 222,218 | 219,820 | 216,832 | 216,014 |
| Marion County | 33,468 | 33,967 | 34,062 | 34,153 | 34,466 | 34,690 | 34,773 | 34,860 | 35,164 | 35,473 | 35,466 |
| Marlboro County | 28,783 | 28,685 | 28,911 | 28,899 | 27,578 | 28,087 | 28,276 | 28,470 | 28,547 | 28,797 | 28,818 |
| McCormick County | 10,140 | 10,137 | 10,076 | 10,085 | 9,999 | 9,952 | 10,157 | 10,133 | 10,115 | 9,985 | 9,958 |
| Newberry County | 38,763 | 38,371 | 38,104 | 37,607 | 37,114 | 36,908 | 36,685 | 36,592 | 36,271 | 36,030 | 36,108 |
| Oconee County | 71,514 | 71,093 | 70,687 | 69,947 | 69,292 | 68,613 | 68,146 | 67,713 | 66,929 | 66,415 | 66,215 |
| Orangeburg County | 90,112 | 90,601 | 90,615 | 89,844 | 90,764 | 90,568 | 90,948 | 91,138 | 91,261 | 91,486 | 91,582 |
| Pickens County | 118,144 | 117,525 | 116,113 | 114,948 | 113,729 | 113,062 | 112,310 | 111,596 | 111,511 | 111,086 | 110,757 |
| Richland County | 372,023 | 366,432 | 360,159 | 351,707 | 345,398 | 343,136 | 335,370 | 329,835 | 326,471 | 321,577 | 320,677 |
| Saluda County | 19,094 | 18,973 | 18,958 | 18,910 | 18,801 | 18,649 | 18,891 | 19,043 | 19,120 | 19,183 | 19,181 |
| Spartanburg County | 286,822 | 282,520 | 276,725 | 270,735 | 265,919 | 263,028 | 261,085 | 259,155 | 256,794 | 254,418 | 253,791 |
| Sumter County | 104,495 | 104,313 | 104,223 | 104,291 | 104,885 | 105,245 | 104,891 | 104,901 | 104,233 | 104,655 | 104,646 |
| Union County | 27,362 | 27,644 | 27,706 | 28,055 | 28,235 | 28,460 | 28,881 | 29,252 | 29,543 | 29,880 | 29,881 |
| Williamsburg County | 34,445 | 34,909 | 35,270 | 35,233 | 34,741 | 35,244 | 35,281 | 36,127 | 36,652 | 37,134 | 37,217 |
| York County | 227,003 | 220,032 | 210,624 | 199,590 | 189,505 | 182,992 | 178,008 | 173,729 | 169,534 | 165,723 | 164,614 |
Source: Population Division, U.S. Census Bureau