22 cities
| City | Parish | 2026 Pop. ↓ |
|---|---|---|
| Destrehan | St. Charles Parish | 11,844 |
| DeRidder | Beauregard Parish | 9,347 |
| Denham Springs | Livingston Parish | 9,328 |
| Donaldsonville | Ascension Parish | 7,063 |
| DeQuincy | Calcasieu Parish | 2,745 |
| Des Allemands | St. Charles Parish | 2,579 |
| Delhi | Richland Parish | 2,489 |
| Delcambre | Vermilion Parish | 1,758 |
| Duson | Lafayette Parish | 1,339 |
| Deville | Rapides Parish | 1,145 |
| Dubach | Lincoln Parish | 900 |
| Doyline | Webster Parish | 637 |
| Dry Prong | Grant Parish | 439 |
| Dulac | Terrebonne Parish | 369 |
| Dodson | Winn Parish | 292 |
| Dixie Inn | Bienville Parish | 270 |
| Dubberly | Webster Parish | 233 |
| Dorseyville | Iberville Parish | 222 |
| Delta | Madison Parish | 207 |
| Darrow | Ascension Parish | 201 |
| Downsville | Union Parish | 109 |
| Delacroix | Plaquemines Parish | 17 |