11 cities
| City | Parish | 2025 Pop. ↓ |
|---|---|---|
| Terrytown | Jefferson Parish | 26,802 |
| Thibodaux | Lafourche Parish | 15,476 |
| Timberlane | Jefferson Parish | 11,079 |
| Tallulah | Madison Parish | 5,474 |
| Tickfaw | Tangipahoa Parish | 686 |
| Tangipahoa | Tangipahoa Parish | 461 |
| Turkey Creek | Evangeline Parish | 405 |
| Tullos | LaSalle Parish | 303 |
| Triumph | Plaquemines Parish | 221 |
| Trout | LaSalle Parish | 210 |
| Taft | St. Charles Parish | 109 |