9 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| St. Gabriel | 1 | 6,929 | 6,438 | 1.43% | 234 | 30 | City |
| Plaquemine | 2 | 5,848 | 6,223 | -1.27% | 2,001 | 3 | City |
| White Castle | 3 | 1,554 | 1,708 | -1.96% | 2,120 | 1 | Town |
| Crescent | 4 | 943 | 875 | -0.11% | 566 | 2 | CDP |
| Maringouin | 5 | 789 | 879 | -2.23% | 1,069 | 1 | Town |
| Rosedale | 6 | 615 | 654 | -1.28% | 79 | 8 | Village |
| Grosse Tete | 7 | 537 | 552 | -0.56% | 366 | 1 | Village |
| Bayou Goula | 8 | 274 | 370 | -7.74% | 112 | 2 | CDP |
| Dorseyville | 9 | 150 | 59 | 7.14% | 987 | 0 | CDP |
St. Gabriel is the largest city in Iberville Parish, with a population of 6,929.
Dorseyville is the smallest city in Iberville Parish, with a population of 150.
There are 9 cities in Iberville Parish, Louisiana.