The largest parish in Louisiana
There are two right answers. By land area it is Vernon Parish; by population it is East Baton Rouge Parish. Which one you want depends on what you meant by largest.
Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025. Retrieved 30 August 2026.
By land area
| Rank | Name | Land area | Population |
|---|---|---|---|
| 1 | Vernon Parish | 1,327 sq mi | 45,091 |
| 2 | Rapides Parish | 1,324 sq mi | 125,877 |
| 3 | Cameron Parish | 1,285 sq mi | 4,718 |
| 4 | Natchitoches Parish | 1,253 sq mi | 36,089 |
| 5 | Terrebonne Parish | 1,230 sq mi | 104,163 |
| 6 | Vermilion Parish | 1,172 sq mi | 57,671 |
| 7 | Beauregard Parish | 1,157 sq mi | 36,673 |
| 8 | Lafourche Parish | 1,070 sq mi | 95,505 |
| 9 | Calcasieu Parish | 1,064 sq mi | 208,466 |
| 10 | Winn Parish | 950 sq mi | 14,961 |
By population
| Rank | Name | Population | Density |
|---|---|---|---|
| 1 | East Baton Rouge Parish | 456,180 | 1,002 per sq mi |
| 2 | Jefferson Parish | 431,398 | 1,434 per sq mi |
| 3 | Orleans Parish | 362,154 | 2,136 per sq mi |
| 4 | St. Tammany Parish | 279,108 | 330 per sq mi |
| 5 | Lafayette Parish | 257,949 | 960 per sq mi |
| 6 | Caddo Parish | 224,226 | 255 per sq mi |
| 7 | Calcasieu Parish | 208,466 | 196 per sq mi |
| 8 | Ouachita Parish | 158,542 | 260 per sq mi |
| 9 | Livingston Parish | 155,036 | 239 per sq mi |
| 10 | Tangipahoa Parish | 141,346 | 179 per sq mi |
And the smallest
More on Louisiana
Rebuilt from source data 30 August 2026. How these figures are produced.