15 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| St. Gabriel | 1 | 6,959 | 6,439 | 1.49% | 235 | 30 | City |
| St. Gabriel | 2 | 6,959 | 6,446 | 1.49% | 235 | 30 | City |
| Plaquemine | 3 | 5,925 | 6,275 | -1% | 2,027 | 3 | City |
| Plaquemine | 4 | 5,925 | 6,223 | -1% | 2,027 | 3 | City |
| White Castle | 5 | 1,587 | 1,726 | -1.55% | 2,165 | 1 | Town |
| White Castle | 6 | 1,587 | 1,712 | -1.55% | 2,165 | 1 | Town |
| Crescent | 7 | 943 | 875 | -0.11% | 566 | 2 | CDP |
| Maringouin | 8 | 806 | 886 | -1.83% | 1,092 | 1 | Town |
| Maringouin | 9 | 806 | 879 | -1.83% | 1,092 | 1 | Town |
| Rosedale | 10 | 639 | 659 | -0.47% | 82 | 8 | Village |
| Rosedale | 11 | 639 | 654 | -0.47% | 82 | 8 | Village |
| Grosse Tete | 12 | 535 | 553 | -0.56% | 365 | 1 | Village |
| Grosse Tete | 13 | 535 | 550 | -0.56% | 365 | 1 | Village |
| Bayou Goula | 14 | 274 | 370 | -7.74% | 112 | 2 | CDP |
| Dorseyville | 15 | 150 | 59 | 7.14% | 987 | 0 | CDP |
St. Gabriel is the largest city in Iberville Parish, with a population of 6,959.
Dorseyville is the smallest city in Iberville Parish, with a population of 150.
There are 15 cities in Iberville Parish, Louisiana.