Louisiana counties by area
Official, comparable measurements for 64 counties and county equivalents.
- 169.6–403.2 mi²
- 408.5–603.3 mi²
- 610.1–709.3 mi²
- 737.5–876.9 mi²
- 879.5–1,326.7 mi²
- 3.7–25 per mi²
- 25–34 per mi²
- 35–69 per mi²
- 80–179 per mi²
- 182–2,136 per mi²
Understanding Louisiana’s county areas
The land-area range runs from Orleans Parish at 169.6 mi² to Vernon Parish at 1,326.7 mi². The largest has 7.8 times the land area of the smallest and accounts for 3.1% of the combined county land in Louisiana. Compare with every state’s largest county.
The median county-equivalent land area is 645.9 mi², above the national median of 604.5 mi². The median describes the middle of the county size distribution; it does not describe how people or development are distributed. A state with a few very large counties can have a much smaller median than its largest entry suggests.
Where water changes the picture
Plaquemines Parish has the most assigned water area, at 1,786.6 mi². St. Bernard Parish has the highest water share, with water making up 82.5% of its total area. Water area and water percentage answer different questions: the first measures an amount, while the second measures the mix of land and water.
Across all 64 entries, water accounts for 17.5% of the combined total area. This is calculated from the summed land and water measurements, rather than averaging county percentages, which would give each small and large county equal weight.
Where people live
An estimated 4,618,189 people lived in Louisiana on July 1, 2025 (−0.9% since 2020), or 1.3% of the national total in this dataset. East Baton Rouge Parish is the most populous county equivalent, with 456,180 residents — 9.9% of the state. The largest by land, Vernon Parish, has 45,091.
Across the state there are 107 people per square mile of land. County densities range from 2,136 in Orleans Parish to 3.7 in Cameron Parish; the median county equivalent has 48. Switch the map above to density to see where the state’s population concentrates.
Compare the largest and smallest county equivalents in Louisiana to see land, water, and total area on the same scale.
These calculations use the 2026 Census county records listed below. County-equivalent boundaries vary between states; area alone does not measure population, density, or usable land. See coverage and calculation rules.
Complete area table
Sorted from largest to smallest land area.
| # | County / equivalent | Land | Water | Water share | Population | Per mi² |
|---|---|---|---|---|---|---|
| 1 | Vernon ParishGEOID 22115 | 1,326.7 mi² | 13.6 mi² | 1% | 45,091 | 34 |
| 2 | Rapides ParishGEOID 22079 | 1,324.1 mi² | 37.4 mi² | 2.7% | 125,877 | 95 |
| 3 | Cameron ParishGEOID 22023 | 1,290.7 mi² | 646 mi² | 33.4% | 4,718 | 3.7 |
| 4 | Natchitoches ParishGEOID 22069 | 1,253 mi² | 46.5 mi² | 3.6% | 36,089 | 29 |
| 5 | Terrebonne ParishGEOID 22109 | 1,229.9 mi² | 852.4 mi² | 40.9% | 104,163 | 85 |
| 6 | Vermilion ParishGEOID 22113 | 1,172.1 mi² | 359.9 mi² | 23.5% | 57,671 | 49 |
| 7 | Beauregard ParishGEOID 22011 | 1,157.5 mi² | 8.5 mi² | 0.7% | 36,673 | 32 |
| 8 | Lafourche ParishGEOID 22057 | 1,069.7 mi² | 398.7 mi² | 27.2% | 95,505 | 89 |
| 9 | Calcasieu ParishGEOID 22019 | 1,064.2 mi² | 30 mi² | 2.7% | 208,466 | 196 |
| 10 | Winn ParishGEOID 22127 | 950 mi² | 6.7 mi² | 0.7% | 14,961 | 16 |
| 11 | St. Landry ParishGEOID 22097 | 923.4 mi² | 15.7 mi² | 1.7% | 80,765 | 87 |
| 12 | Caddo ParishGEOID 22017 | 879.5 mi² | 57.5 mi² | 6.1% | 224,226 | 255 |
| 13 | Union ParishGEOID 22111 | 876.9 mi² | 28.4 mi² | 3.1% | 20,561 | 23 |
| 14 | De Soto ParishGEOID 22031 | 876.5 mi² | 18.1 mi² | 2% | 27,381 | 31 |
| 15 | Sabine ParishGEOID 22085 | 866.6 mi² | 144.9 mi² | 14.3% | 21,834 | 25 |
| 16 | St. Tammany ParishGEOID 22103 | 845.3 mi² | 250.3 mi² | 22.8% | 279,108 | 330 |
| 17 | Bossier ParishGEOID 22015 | 839.6 mi² | 27.3 mi² | 3.1% | 131,867 | 157 |
| 18 | Avoyelles ParishGEOID 22009 | 831.4 mi² | 34.3 mi² | 4% | 37,941 | 46 |
| 19 | Bienville ParishGEOID 22013 | 811.3 mi² | 10.8 mi² | 1.3% | 12,269 | 15 |
| 20 | Morehouse ParishGEOID 22067 | 795 mi² | 11.2 mi² | 1.4% | 23,705 | 30 |
| 21 | Tangipahoa ParishGEOID 22105 | 791.2 mi² | 52.8 mi² | 6.3% | 141,346 | 179 |
| 22 | Plaquemines ParishGEOID 22075 | 780.6 mi² | 1,786.6 mi² | 69.6% | 22,256 | 29 |
| 23 | Allen ParishGEOID 22003 | 762.1 mi² | 4 mi² | 0.5% | 22,672 | 30 |
| 24 | Claiborne ParishGEOID 22027 | 754.8 mi² | 12.5 mi² | 1.6% | 13,354 | 18 |
| 25 | St. Martin ParishGEOID 22099 | 737.5 mi² | 79.2 mi² | 9.7% | 51,106 | 69 |
| 26 | Catahoula ParishGEOID 22025 | 709.3 mi² | 30.2 mi² | 4.1% | 8,223 | 12 |
| 27 | Concordia ParishGEOID 22029 | 695.7 mi² | 51.7 mi² | 6.9% | 17,836 | 26 |
| 28 | Washington ParishGEOID 22117 | 669.6 mi² | 6.2 mi² | 0.9% | 44,937 | 67 |
| 29 | Evangeline ParishGEOID 22039 | 662.4 mi² | 17.2 mi² | 2.5% | 31,980 | 48 |
| 30 | Acadia ParishGEOID 22001 | 655.2 mi² | 2.3 mi² | 0.3% | 57,032 | 87 |
| 31 | Jefferson Davis ParishGEOID 22053 | 651.5 mi² | 7.2 mi² | 1.1% | 31,471 | 48 |
| 32 | Livingston ParishGEOID 22063 | 648.1 mi² | 43.3 mi² | 6.3% | 155,036 | 239 |
| 33 | Grant ParishGEOID 22043 | 643.8 mi² | 21.1 mi² | 3.2% | 22,075 | 34 |
| 34 | LaSalle ParishGEOID 22059 | 624.9 mi² | 37.7 mi² | 5.7% | 15,154 | 24 |
| 35 | Franklin ParishGEOID 22041 | 624.3 mi² | 10.8 mi² | 1.7% | 19,002 | 30 |
| 36 | Madison ParishGEOID 22065 | 623.9 mi² | 26.4 mi² | 4.1% | 8,844 | 14 |
| 37 | Iberville ParishGEOID 22047 | 617.3 mi² | 35.7 mi² | 5.5% | 29,579 | 48 |
| 38 | Ouachita ParishGEOID 22073 | 610.1 mi² | 21.6 mi² | 3.4% | 158,542 | 260 |
| 39 | Tensas ParishGEOID 22107 | 603.3 mi² | 38.4 mi² | 6% | 3,700 | 6.1 |
| 40 | Webster ParishGEOID 22119 | 593.3 mi² | 21.6 mi² | 3.5% | 34,948 | 59 |
| 41 | Iberia ParishGEOID 22045 | 574.7 mi² | 465.6 mi² | 44.8% | 66,846 | 116 |
| 42 | Jackson ParishGEOID 22049 | 569.7 mi² | 10.7 mi² | 1.8% | 15,834 | 28 |
| 43 | St. Mary ParishGEOID 22101 | 558.5 mi² | 561.2 mi² | 50.1% | 46,552 | 83 |
| 44 | Richland ParishGEOID 22083 | 555.6 mi² | 8.8 mi² | 1.6% | 19,582 | 35 |
| 45 | Pointe Coupee ParishGEOID 22077 | 555.5 mi² | 34.9 mi² | 5.9% | 19,520 | 35 |
| 46 | Caldwell ParishGEOID 22021 | 529.8 mi² | 11.2 mi² | 2.1% | 9,344 | 18 |
| 47 | Lincoln ParishGEOID 22061 | 471.6 mi² | 0.7 mi² | 0.2% | 48,360 | 103 |
| 48 | East Baton Rouge ParishGEOID 22033 | 455.5 mi² | 14.9 mi² | 3.2% | 456,180 | 1,002 |
| 49 | East Feliciana ParishGEOID 22037 | 453.3 mi² | 2.4 mi² | 0.5% | 18,911 | 42 |
| 50 | East Carroll ParishGEOID 22035 | 421.2 mi² | 21.4 mi² | 4.8% | 6,760 | 16 |
| 51 | St. Helena ParishGEOID 22091 | 408.5 mi² | 1.1 mi² | 0.3% | 10,758 | 26 |
| 52 | West Feliciana ParishGEOID 22125 | 403.2 mi² | 22.8 mi² | 5.3% | 15,134 | 38 |
| 53 | Red River ParishGEOID 22081 | 389 mi² | 13.2 mi² | 3.3% | 7,165 | 18 |
| 54 | St. Bernard ParishGEOID 22087 | 377.5 mi² | 1,777.7 mi² | 82.5% | 45,642 | 121 |
| 55 | West Carroll ParishGEOID 22123 | 359.7 mi² | 0.9 mi² | 0.3% | 9,156 | 25 |
| 56 | Assumption ParishGEOID 22007 | 344 mi² | 25.9 mi² | 7% | 19,720 | 57 |
| 57 | Jefferson ParishGEOID 22051 | 300.9 mi² | 341.2 mi² | 53.1% | 431,398 | 1,434 |
| 58 | Ascension ParishGEOID 22005 | 290 mi² | 12.7 mi² | 4.2% | 135,105 | 466 |
| 59 | St. Charles ParishGEOID 22089 | 277.7 mi² | 119.2 mi² | 30% | 50,586 | 182 |
| 60 | Lafayette ParishGEOID 22055 | 268.8 mi² | 0.4 mi² | 0.2% | 257,949 | 960 |
| 61 | St. James ParishGEOID 22093 | 237.9 mi² | 15 mi² | 5.9% | 18,938 | 80 |
| 62 | St. John the Baptist ParishGEOID 22095 | 214.5 mi² | 195.5 mi² | 47.7% | 39,875 | 186 |
| 63 | West Baton Rouge ParishGEOID 22121 | 192.3 mi² | 11.4 mi² | 5.6% | 28,756 | 150 |
| 64 | Orleans ParishGEOID 22071 | 169.6 mi² | 180.3 mi² | 51.5% | 362,154 | 2,136 |