| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mansfield | 1 | 4,433 | 4,685 | -0.94% | 1,214 | 4 | City |
| Stonewall | 2 | 2,793 | 2,349 | 2.84% | 325 | 9 | Town |
| Logansport | 3 | 1,323 | 1,332 | -0.15% | 390 | 3 | Town |
| South Mansfield | 4 | 344 | 342 | 0% | 507 | 1 | Village |
| Grand Cane | 5 | 212 | 216 | -0.47% | 187 | 1 | Village |
| Stanley | 6 | 126 | 125 | 0% | 58 | 2 | Village |
| Longstreet | 7 | 122 | 119 | 0% | 59 | 2 | Village |
Mansfield is the largest city in De Soto Parish, with a population of 4,433.
Longstreet is the smallest city in De Soto Parish, with a population of 122.
There are 7 cities in De Soto Parish, Louisiana.