Louisiana
People per square mile, 1990:
People per square mile, 2000:
Historic & Projected Growth
1790 to 2030

| Year | Population | Year | Population | Year | Population | ||
| 1790 | 0 | 1880 | 939,946 | 1970 | 3,644,637 | ||
| 1800 | 0 | 1890 | 1,118,588 | 1980 | 4,206,116 | ||
| 1810 | 76,556 | 1900 | 1,381,625 | 1990 | 4,219,973 | ||
| 1820 | 153,407 | 1910 | 1,656,388 | 2000 | 4,468,976 | ||
| 1830 | 215,739 | 1920 | 1,798,509 | 2010 | 4,612,679 | ||
| 1840 | 352,411 | 1930 | 2,101,593 | 2020 | 4,719,160 | ||
| 1850 | 517,762 | 1940 | 2,363,880 | 2030 | 4,802,633 | ||
| 1860 | 708,002 | 1950 | 2,683,516 | ||||
| 1870 | 726,915 | 1960 | 3,257,022 |
Population By Parish
| CENSUS 2000 POPULATION | CHANGE |
CHANGE |
|
|
|
4,468,976 | 249,003 | 5.9 |
| Acadia Parish | 58,861 | 2,979 | 5.3 |
| Allen Parish | 25,440 | 4,214 | 19.9 |
| Ascension Parish | 76,627 | 18,413 | 31.6 |
| Assumption Parish | 23,388 | 635 | 2.8 |
| Avoyelles Parish | 41,481 | 2,322 | 5.9 |
| Beauregard Parish | 32,986 | 2,903 | 9.6 |
| Bienville Parish | 15,752 | -227 | -1.4 |
| Bossier Parish | 98,310 | 12,222 | 14.2 |
| Caddo Parish | 252,161 | 3,908 | 1.6 |
| Calcasieu Parish | 183,577 | 15,443 | 9.2 |
| Caldwell Parish | 10,560 | 750 | 7.6 |
| Cameron Parish | 9,991 | 731 | 7.9 |
| Catahoula Parish | 10,920 | -145 | -1.3 |
| Claiborne Parish | 16,851 | -554 | -3.2 |
| Concordia Parish | 20,247 | -581 | -2.8 |
| De Soto Parish | 25,494 | 148 | 0.6 |
| East Baton Rouge Parish | 412,852 | 32,747 | 8.6 |
| East Carroll Parish | 9,421 | -288 | -3.0 |
| East Feliciana Parish | 21,360 | 2,149 | 11.2 |
| Evangeline Parish | 35,434 | 2,160 | 6.5 |
| Franklin Parish | 21,263 | -1,124 | -5.0 |
| Grant Parish | 18,698 | 1,172 | 6.7 |
| Iberia Parish | 73,266 | 4,969 | 7.3 |
| Iberville Parish | 33,320 | 2,271 | 7.3 |
| Jackson Parish | 15,397 | -308 | -2.0 |
| Jefferson Parish | 455,466 | 7,160 | 1.6 |
| Jefferson Davis Parish | 31,435 | 713 | 2.3 |
| Lafayette Parish | 190,503 | 25,741 | 15.6 |
| Lafourche Parish | 89,974 | 4,114 | 4.8 |
| La Salle Parish | 14,282 | 620 | 4.5 |
| Lincoln Parish | 42,509 | 764 | 1.8 |
| Livingston Parish | 91,814 | 21,288 | 30.2 |
| Madison Parish | 13,728 | 1,265 | 10.2 |
| Morehouse Parish | 31,021 | -917 | -2.9 |
| Natchitoches Parish | 39,080 | 2,391 | 6.5 |
| Orleans Parish | 484,674 | -12,264 | -2.5 |
| Ouachita Parish | 147,250 | 5,059 | 3.6 |
| Plaquemines Parish | 26,757 | 1,182 | 4.6 |
| Pointe Coupee Parish | 22,763 | 223 | 1.0 |
| Rapides Parish | 126,337 | -5,219 | -4.0 |
| Red River Parish | 9,622 | 235 | 2.5 |
| Richland Parish | 20,981 | 352 | 1.7 |
| Sabine Parish | 23,459 | 813 | 3.6 |
| St. Bernard Parish | 67,229 | 598 | 0.9 |
| St. Charles Parish | 48,072 | 5,635 | 13.3 |
| St. Helena Parish | 10,525 | 651 | 6.6 |
| St. James Parish | 21,216 | 337 | 1.6 |
| St. John the Baptist Parish | 43,044 | 3,048 | 7.6 |
| St. Landry Parish | 87,700 | 7,369 | 9.2 |
| St. Martin Parish | 48,583 | 4,605 | 10.5 |
| St. Mary Parish | 53,500 | -4,586 | -7.9 |
| St. Tammany Parish | 191,268 | 46,760 | 32.4 |
| Tangipahoa Parish | 100,588 | 14,879 | 17.4 |
| Tensas Parish | 6,618 | -485 | -6.8 |
| Terrebonne Parish | 104,503 | 7,521 | 7.8 |
| Union Parish | 22,803 | 2,113 | 10.2 |
| Vermilion Parish | 53,807 | 3,752 | 7.5 |
| Vernon Parish | 52,531 | -9,430 | -15.2 |
| Washington Parish | 43,926 | 741 | 1.7 |
| Webster Parish | 41,831 | -158 | -0.4 |
| West Baton Rouge Parish | 21,601 | 2,182 | 11.2 |
| West Carroll Parish | 12,314 | 221 | 1.8 |
| West Feliciana Parish | 15,111 | 2,196 | 17.0 |
| Winn Parish | 16,894 | 625 | 3.8 |
SOURCE: U.S. Bureau of the Census
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