| Rank | Water Area ▼ | School District / Population |
| 1. | 1,787.29 sq mi | Plaquemines Parish School District / 23,545 |
| 2. | 1,780.55 sq mi | St. Bernard Parish School District / 41,114 |
| 3. | 850.26 sq mi | Terrebonne Parish School District / 112,167 |
| 4. | 651.78 sq mi | Cameron Parish School District / 6,713 |
| 5. | 564.04 sq mi | St. Mary Parish School District / 53,784 |
| 6. | 456.42 sq mi | Iberia Parish School District / 73,735 |
| 7. | 406.09 sq mi | Lafourche Parish School District / 97,235 |
| 8. | 369.79 sq mi | Jefferson Parish School District / 434,528 |
| 9. | 368.87 sq mi | Vermilion Parish School District / 58,784 |
| 10. | 278.64 sq mi | St. Tammany Parish School District / 239,814 |
| 11. | 180.79 sq mi | Orleans Parish School District / 368,471 |
| 12. | 144.96 sq mi | Sabine Parish School District / 24,286 |
| 13. | 134.57 sq mi | St. John the Baptist Parish School District / 44,570 |
| 14. | 131.55 sq mi | St. Charles Parish School District / 52,616 |
| 15. | 78.84 sq mi | St. Martin Parish School District / 52,823 |
| 16. | 58.28 sq mi | Caddo Parish School District / 255,529 |
| 17. | 54.68 sq mi | Livingston Parish School District / 132,160 |
| 18. | 50.38 sq mi | Concordia Parish School District / 20,609 |
| 19. | 46.74 sq mi | Natchitoches Parish School District / 39,359 |
| 20. | 43.69 sq mi | Rapides Parish School District / 132,199 |
| 21. | 38.41 sq mi | Tensas Parish School District / 5,008 |
| 22. | 37.71 sq mi | La Salle Parish School District / 14,874 |
| 23. | 34.23 sq mi | Iberville Parish School District / 33,375 |
| 24. | 33.37 sq mi | Pointe Coupee Parish School District / 22,631 |
| 25. | 33.31 sq mi | Avoyelles Parish School District / 41,604 |
| 26. | 31.99 sq mi | Tangipahoa Parish School District / 124,125 |
| 27. | 31.39 sq mi | Catahoula Parish School District / 10,273 |
| 28. | 30.61 sq mi | Calcasieu Parish School District / 194,943 |
| 29. | 28.41 sq mi | Union Parish School District / 22,623 |
| 30. | 27.16 sq mi | Bossier Parish School District / 121,918 |
| 31. | 26.46 sq mi | Madison Parish School District / 12,008 |
| 32. | 25.87 sq mi | Assumption Parish School District / 23,170 |
| 33. | 22.79 sq mi | West Feliciana Parish School District / 15,485 |
| 34. | 21.81 sq mi | Webster Parish School District / 40,890 |
| 35. | 21.73 sq mi | East Carroll Parish School District / 7,602 |
| 36. | 21.63 sq mi | Grant Parish School District / 22,363 |
| 37. | 19.01 sq mi | De Soto Parish School District / 26,968 |
| 38. | 18.10 sq mi | Ouachita Parish School District / 105,830 |
| 39. | 17.25 sq mi | Evangeline Parish School District / 33,778 |
| 40. | 16.42 sq mi | St. James Parish School District / 21,782 |
| 41. | 15.10 sq mi | St. Landry Parish School District / 83,518 |
| 42. | 13.57 sq mi | Vernon Parish School District / 52,844 |
| 43. | 13.25 sq mi | Red River Parish School District / 8,937 |
| 44. | 12.80 sq mi | Ascension Parish School District / 112,308 |
| 45. | 12.54 sq mi | Claiborne Parish School District / 16,817 |
| 46. | 11.48 sq mi | East Baton Rouge Parish School District / 378,390 |
| 47. | 11.43 sq mi | West Baton Rouge Parish School District / 24,347 |
| 48. | 11.30 sq mi | Caldwell Parish School District / 10,008 |
| 49. | 11.15 sq mi | Morehouse Parish School District / 27,319 |
| 50. | 11.09 sq mi | Jackson Parish School District / 16,199 |
| 51. | 10.85 sq mi | Franklin Parish School District / 20,645 |
| 52. | 10.80 sq mi | Bienville Parish School District / 14,122 |
| 53. | 8.49 sq mi | Beauregard Parish School District / 36,109 |
| 54. | 7.23 sq mi | Jefferson Davis Parish School District / 31,492 |
| 55. | 6.74 sq mi | Winn Parish School District / 15,000 |
| 56. | 6.31 sq mi | Washington Parish School District / 34,652 |
| 57. | 5.47 sq mi | Richland Parish School District / 20,845 |
| 58. | 4.11 sq mi | Allen Parish School District / 25,691 |
| 59. | 3.24 sq mi | Monroe City School District / 49,455 |
| 60. | 3.11 sq mi | Zachary Community School District / 22,403 |
| 61. | 2.37 sq mi | East Feliciana Parish School District / 19,964 |
| 62. | 2.34 sq mi | Acadia Parish School District / 62,031 |
| 63. | 1.09 sq mi | St. Helena Parish School District / 10,937 |
| 64. | 0.92 sq mi | West Carroll Parish School District / 11,522 |
| 65. | 0.73 sq mi | Lincoln Parish School District / 47,243 |
| 66. | 0.49 sq mi | Lafayette Parish School District / 228,084 |
| 67. | 0.27 sq mi | Central Community School District / 29,021 |
| 68. | 0.05 sq mi | Bogalusa City School District / 12,071 |
| 69. | 0.00 sq mi | Baker City School District / 13,784 |
Please note that we only rank locations with 'Water Area' data. The rank above might not be a complete list. Locations without 'Water Area' data are not listed.
