Identifiers: CDP · city · town
| Rank | Community | Population |
|---|---|---|
| 1 | Laplace (CDP), LA | 28,841 |
| 2 | Gonzales (city), LA | 12,231 |
| 3 | Reserve (CDP), LA | 8,541 |
| 4 | Donaldsonville (city), LA | 6,695 |
| 5 | South Vacherie (CDP), LA | 3,388 |
| 6 | Lutcher (town), LA | 3,133 |
| 7 | Norco (CDP), LA | 2,984 |
| 8 | Gramercy (town), LA | 2,932 |
| 9 | Grand Point (CDP), LA | 2,241 |
| 10 | Garyville (CDP), LA | 2,123 |
| 11 | Montz (CDP), LA | 2,106 |
| 12 | North Vacherie (CDP), LA | 2,093 |
| 13 | Edgard (CDP), LA | 1,948 |
| 14 | Paulina (CDP), LA | 1,778 |
| 15 | Sorrento (town), LA | 1,514 |
| 16 | Wallace (CDP), LA | 755 |
| 17 | Union (CDP), LA | 735 |
| 18 | Killona (CDP), LA | 724 |
| 19 | Lemannville (CDP), LA | 695 |
| 20 | Welcome (CDP), LA | 672 |