| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| St. Gabriel | 1 | 7,096 | 6,438 | 1.56% | 239 | 30 | City |
| Plaquemine | 2 | 5,824 | 6,227 | -1.14% | 1,992 | 3 | City |
| White Castle | 3 | 1,557 | 1,716 | -1.77% | 2,124 | 1 | Town |
| Maringouin | 4 | 795 | 878 | -1.85% | 1,077 | 1 | Town |
| Rosedale | 5 | 630 | 653 | -0.79% | 81 | 8 | Village |
| Grosse Tete | 6 | 522 | 549 | -0.95% | 356 | 1 | Village |
St. Gabriel is the largest city in Iberville Parish, with a population of 7,096.
Grosse Tete is the smallest city in Iberville Parish, with a population of 522.
There are 6 cities in Iberville Parish, Louisiana.