15 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Hammond | 1 | 24,355 | 19,632 | 3.97% | 1,708 | 14 | City |
| Hammond | 2 | 24,355 | 19,708 | 3.97% | 1,708 | 14 | City |
| Ponchatoula | 3 | 7,711 | 7,786 | -0.31% | 1,634 | 5 | City |
| Ponchatoula | 4 | 7,711 | 7,828 | -0.31% | 1,634 | 5 | City |
| Natalbany | 5 | 3,096 | 2,847 | 0.23% | 700 | 4 | CDP |
| Kentwood | 6 | 2,205 | 2,148 | 0.46% | 310 | 7 | Town |
| Kentwood | 7 | 2,205 | 2,155 | 0.46% | 310 | 7 | Town |
| Independence | 8 | 1,657 | 1,631 | 0.24% | 687 | 2 | Town |
| Independence | 9 | 1,657 | 1,637 | 0.24% | 687 | 2 | Town |
| Roseland | 10 | 894 | 878 | 0.22% | 431 | 2 | Town |
| Roseland | 11 | 894 | 882 | 0.22% | 431 | 2 | Town |
| Tickfaw | 12 | 688 | 669 | 0.44% | 425 | 2 | Village |
| Tickfaw | 13 | 688 | 671 | 0.44% | 425 | 2 | Village |
| Tangipahoa | 14 | 455 | 426 | 1.11% | 453 | 1 | Village |
| Tangipahoa | 15 | 455 | 428 | 1.11% | 453 | 1 | Village |
Hammond is the largest city in Tangipahoa Parish, with a population of 24,355.
Tangipahoa is the smallest city in Tangipahoa Parish, with a population of 455.
There are 15 cities in Tangipahoa Parish, Louisiana.