(Links below lead to Quick Facts for Louisiana Parishes: People, Business & Geography at U.S. Census Bureau.)
| Area | 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 |
| Louisiana | 4,410,796 | 4,373,310 | 4,243,634 | 4,495,627 | 4,487,830 | 4,473,558 | 4,465,215 | 4,460,395 | 4,468,879 | 4,468,976 |
|---|---|---|---|---|---|---|---|---|---|---|
| Acadia Parish | 60,070 | 59,803 | 59,648 | 58,768 | 58,633 | 58,747 | 58,803 | 58,732 | 58,819 | 58,861 |
| Allen Parish | 25,635 | 25,573 | 25,582 | 24,872 | 25,197 | 25,191 | 25,116 | 25,399 | 25,410 | 25,440 |
| Ascension Parish | 101,789 | 99,089 | 95,518 | 89,118 | 85,888 | 83,609 | 81,164 | 79,086 | 77,278 | 76,627 |
| Assumption Parish | 22,881 | 22,958 | 23,015 | 22,836 | 23,042 | 23,068 | 23,111 | 23,174 | 23,379 | 23,388 |
| Avoyelles Parish | 42,360 | 42,131 | 42,275 | 41,322 | 41,485 | 41,612 | 41,368 | 41,343 | 41,476 | 41,481 |
| Beauregard Parish | 34,978 | 34,773 | 34,683 | 34,236 | 33,711 | 33,317 | 33,081 | 33,063 | 33,027 | 32,986 |
| Bienville Parish | 14,728 | 14,874 | 14,863 | 14,985 | 15,128 | 15,166 | 15,347 | 15,443 | 15,728 | 15,752 |
| Bossier Parish | 110,250 | 108,746 | 107,602 | 105,257 | 103,646 | 101,948 | 100,898 | 99,797 | 98,807 | 98,310 |
| Caddo Parish | 252,895 | 252,477 | 253,260 | 250,188 | 249,876 | 249,211 | 249,632 | 250,666 | 251,802 | 252,161 |
| Calcasieu Parish | 185,618 | 184,471 | 183,204 | 184,401 | 184,082 | 183,590 | 182,842 | 182,976 | 183,518 | 183,577 |
| Caldwell Parish | 10,353 | 10,305 | 10,355 | 10,387 | 10,503 | 10,450 | 10,504 | 10,478 | 10,579 | 10,560 |
| Cameron Parish | 7,238 | 7,409 | 7,684 | 9,560 | 9,626 | 9,682 | 9,733 | 9,833 | 9,950 | 9,991 |
| Catahoula Parish | 10,522 | 10,414 | 10,363 | 10,258 | 10,461 | 10,560 | 10,663 | 10,794 | 10,903 | 10,920 |
| Claiborne Parish | 16,142 | 16,290 | 16,424 | 16,300 | 16,135 | 16,429 | 16,484 | 16,606 | 16,779 | 16,851 |
| Concordia Parish | 19,064 | 19,047 | 19,193 | 18,927 | 19,197 | 19,483 | 19,738 | 19,931 | 20,212 | 20,247 |
| De Soto Parish | 26,388 | 26,277 | 26,051 | 25,946 | 25,899 | 25,631 | 25,584 | 25,452 | 25,513 | 25,494 |
| East Baton Rouge Parish | 428,360 | 429,914 | 430,614 | 411,584 | 412,595 | 411,344 | 410,340 | 411,356 | 412,890 | 412,852 |
| East Carroll Parish | 8,166 | 8,270 | 8,299 | 8,457 | 8,662 | 8,809 | 8,960 | 9,174 | 9,403 | 9,421 |
| East Feliciana Parish | 20,874 | 20,827 | 21,010 | 20,535 | 20,689 | 20,915 | 21,028 | 21,198 | 21,365 | 21,360 |
| Evangeline Parish | 35,624 | 35,898 | 35,646 | 35,198 | 34,930 | 34,902 | 35,168 | 35,289 | 35,399 | 35,434 |
| Franklin Parish | 20,006 | 20,061 | 20,064 | 20,155 | 20,485 | 20,623 | 20,731 | 20,958 | 21,246 | 21,263 |
| Grant Parish | 19,974 | 19,765 | 19,722 | 19,285 | 18,986 | 18,740 | 18,670 | 18,643 | 18,687 | 18,698 |
| Iberia Parish | 75,097 | 74,943 | 74,615 | 73,598 | 73,393 | 73,378 | 73,334 | 73,270 | 73,233 | 73,266 |
| Iberville Parish | 32,545 | 32,467 | 32,800 | 32,203 | 32,349 | 32,746 | 33,038 | 33,231 | 33,315 | 33,320 |
| Jackson Parish | 15,191 | 15,102 | 15,239 | 15,058 | 15,151 | 15,189 | 15,207 | 15,369 | 15,381 | 15,397 |
| Jefferson Davis Parish | 31,263 | 31,136 | 31,204 | 30,901 | 30,825 | 30,874 | 30,947 | 31,100 | 31,399 | 31,435 |
| Jefferson Parish | 436,181 | 440,339 | 422,222 | 450,848 | 452,116 | 451,144 | 451,213 | 451,981 | 454,693 | 455,466 |
| La Salle Parish | 14,062 | 14,039 | 14,026 | 13,895 | 14,030 | 14,100 | 14,192 | 14,121 | 14,264 | 14,282 |
| Lafayette Parish | 206,976 | 204,649 | 203,203 | 197,212 | 195,514 | 193,820 | 192,700 | 190,780 | 190,444 | 190,503 |
| Lafourche Parish | 92,572 | 92,704 | 92,775 | 91,347 | 91,608 | 91,221 | 90,652 | 90,040 | 89,972 | 89,974 |
| Lincoln Parish | 42,561 | 42,558 | 42,574 | 42,668 | 42,744 | 42,366 | 41,990 | 42,187 | 42,510 | 42,509 |
| Livingston Parish | 120,256 | 116,469 | 113,186 | 107,390 | 104,612 | 101,051 | 98,296 | 95,197 | 92,530 | 91,814 |
| Madison Parish | 11,790 | 11,814 | 11,936 | 12,093 | 12,261 | 12,620 | 13,028 | 13,394 | 13,707 | 13,728 |
| Morehouse Parish | 28,602 | 28,760 | 29,225 | 29,421 | 29,948 | 30,263 | 30,361 | 30,630 | 30,961 | 31,021 |
| Natchitoches Parish | 39,576 | 39,487 | 39,412 | 38,778 | 38,690 | 38,691 | 39,027 | 38,782 | 39,097 | 39,080 |
| Orleans Parish | 311,853 | 288,113 | 210,768 | 455,046 | 461,600 | 467,515 | 472,556 | 477,835 | 483,635 | 484,674 |
| Ouachita Parish | 150,051 | 149,493 | 149,618 | 148,181 | 148,461 | 147,887 | 147,326 | 146,599 | 147,268 | 147,250 |
| Plaquemines Parish | 21,276 | 21,597 | 21,610 | 28,565 | 28,615 | 27,652 | 27,123 | 26,853 | 26,737 | 26,757 |
| Pointe Coupee Parish | 22,401 | 22,359 | 22,370 | 21,807 | 22,119 | 22,206 | 22,352 | 22,524 | 22,756 | 22,763 |
| Rapides Parish | 133,131 | 132,891 | 132,423 | 127,765 | 127,322 | 126,778 | 126,453 | 126,272 | 126,397 | 126,337 |
| Red River Parish | 9,118 | 9,186 | 9,196 | 9,204 | 9,362 | 9,413 | 9,433 | 9,479 | 9,598 | 9,622 |
| Richland Parish | 20,501 | 20,455 | 20,452 | 20,301 | 20,358 | 20,477 | 20,723 | 20,851 | 20,930 | 20,981 |
| Sabine Parish | 23,688 | 23,653 | 23,571 | 23,413 | 23,326 | 23,369 | 23,296 | 23,349 | 23,495 | 23,459 |
| St. Bernard Parish | 37,722 | 33,439 | 13,924 | 64,890 | 65,376 | 65,684 | 66,255 | 66,540 | 66,988 | 67,229 |
| St. Charles Parish | 51,547 | 51,982 | 51,868 | 50,116 | 49,522 | 49,037 | 48,959 | 48,410 | 48,162 | 48,072 |
| St. Helena Parish | 10,546 | 10,590 | 10,667 | 10,171 | 10,259 | 10,322 | 10,430 | 10,425 | 10,508 | 10,525 |
| St. James Parish | 21,231 | 21,371 | 21,230 | 20,807 | 20,766 | 20,930 | 21,156 | 21,206 | 21,238 | 21,216 |
| St. John the Baptist Parish | 46,994 | 47,678 | 47,647 | 45,568 | 45,025 | 44,435 | 43,940 | 43,567 | 43,153 | 43,044 |
| St. Landry Parish | 92,173 | 91,365 | 90,739 | 88,635 | 88,305 | 87,957 | 87,797 | 87,610 | 87,713 | 87,700 |
| St. Martin Parish | 52,097 | 51,624 | 51,163 | 50,002 | 49,867 | 49,575 | 49,340 | 49,068 | 48,655 | 48,583 |
| St. Mary Parish | 51,083 | 51,286 | 51,614 | 50,855 | 51,526 | 51,883 | 52,179 | 52,526 | 53,258 | 53,500 |
| St. Tammany Parish | 228,456 | 226,263 | 223,863 | 217,367 | 211,488 | 205,833 | 200,833 | 195,693 | 192,172 | 191,268 |
| Tangipahoa Parish | 117,001 | 115,455 | 113,041 | 106,182 | 104,714 | 103,337 | 102,285 | 101,608 | 100,827 | 100,588 |
| Tensas Parish | 5,694 | 5,828 | 5,999 | 5,949 | 6,026 | 6,159 | 6,334 | 6,463 | 6,577 | 6,618 |
| Terrebonne Parish | 108,576 | 108,316 | 108,043 | 106,167 | 105,435 | 105,157 | 104,912 | 104,724 | 104,455 | 104,503 |
| Union Parish | 22,692 | 22,738 | 22,803 | 22,718 | 22,658 | 22,755 | 22,644 | 22,805 | 22,779 | 22,803 |
| Vermilion Parish | 56,096 | 55,668 | 55,371 | 54,876 | 54,336 | 54,131 | 54,200 | 53,938 | 53,964 | 53,807 |
| Vernon Parish | 45,639 | 47,527 | 48,453 | 50,230 | 50,193 | 51,118 | 51,514 | 52,223 | 52,523 | 52,531 |
| Washington Parish | 45,430 | 44,995 | 44,028 | 43,919 | 43,748 | 43,690 | 43,766 | 43,775 | 43,891 | 43,926 |
| Webster Parish | 40,754 | 40,870 | 40,922 | 40,843 | 40,862 | 40,908 | 41,246 | 41,314 | 41,710 | 41,831 |
| West Baton Rouge Parish | 22,553 | 22,620 | 22,184 | 21,518 | 21,723 | 21,573 | 21,644 | 21,621 | 21,564 | 21,601 |
| West Carroll Parish | 11,495 | 11,550 | 11,685 | 11,790 | 11,879 | 12,057 | 12,077 | 12,070 | 12,283 | 12,314 |
| West Feliciana Parish | 15,003 | 15,062 | 15,239 | 15,040 | 14,978 | 15,084 | 15,064 | 15,080 | 15,137 | 15,111 |
| Winn Parish | 15,408 | 15,497 | 15,651 | 15,715 | 15,884 | 16,146 | 16,428 | 16,494 | 16,830 | 16,894 |
Source: Population Division, U.S. Census Bureau