| City | County | 2026 Pop. ↓ |
|---|---|---|
| Terrytown | Jefferson Parish | 26,427 |
| Thibodaux | Lafourche Parish | 15,498 |
| Timberlane | Jefferson Parish | 11,383 |
| Tallulah | Madison Parish | 5,372 |
| Tickfaw | Tangipahoa Parish | 694 |
| Tangipahoa | Tangipahoa Parish | 461 |
| Turkey Creek | Evangeline Parish | 402 |
| Tullos | LaSalle Parish | 310 |
| Taft | St. Charles Parish | 124 |
| Triumph | Plaquemines Parish | 71 |