| City | County | 2026 Pop. ↓ |
|---|---|---|
| Destrehan | St. Charles Parish | 11,844 |
| DeRidder | Beauregard Parish | 9,422 |
| Denham Springs | Livingston Parish | 9,391 |
| Donaldsonville | Ascension Parish | 7,164 |
| DeQuincy | Calcasieu Parish | 2,820 |
| Des Allemands | St. Charles Parish | 2,579 |
| Delhi | Richland Parish | 2,498 |
| Delcambre | Vermilion Parish | 1,758 |
| Duson | Lafayette Parish | 1,357 |
| Deville | Rapides Parish | 1,145 |
| Dubach | Lincoln Parish | 896 |
| Doyline | Webster Parish | 640 |
| Dry Prong | Grant Parish | 440 |
| Dulac | Terrebonne Parish | 369 |
| Dodson | Winn Parish | 345 |
| Dixie Inn | Bienville Parish | 272 |
| Dubberly | Webster Parish | 235 |
| Dorseyville | Iberville Parish | 222 |
| Delta | Madison Parish | 204 |
| Darrow | Ascension Parish | 201 |
| Downsville | Union Parish | 112 |
| Delacroix | Plaquemines Parish | 17 |