10 cities
| City | Parish | 2025 Pop. ↓ |
|---|---|---|
| Terrytown | Jefferson Parish | 26,232 |
| Thibodaux | Lafourche Parish | 15,487 |
| Timberlane | Jefferson Parish | 11,311 |
| Tallulah | Madison Parish | 5,533 |
| Tickfaw | Tangipahoa Parish | 688 |
| Tangipahoa | Tangipahoa Parish | 455 |
| Turkey Creek | Evangeline Parish | 398 |
| Tullos | LaSalle Parish | 300 |
| Taft | St. Charles Parish | 117 |
| Triumph | Plaquemines Parish | 80 |