Identifiers: city · CDP · town
| Rank | Community | Population |
|---|---|---|
| 1 | Brownsville (city), TX | 186,738 |
| 2 | Harlingen (city), TX | 71,829 |
| 3 | San Benito (city), TX | 24,861 |
| 4 | Mercedes (city), TX | 16,258 |
| 5 | Los Fresnos (city), TX | 8,114 |
| 6 | La Feria (city), TX | 6,817 |
| 7 | Cameron Park (CDP), TX | 6,099 |
| 8 | Primera (town), TX | 5,257 |
| 9 | Port Isabel (city), TX | 5,028 |
| 10 | Laureles (CDP), TX | 4,111 |
| 11 | Laguna Vista (town), TX | 3,520 |
| 12 | La Paloma (CDP), TX | 3,218 |
| 13 | Combes (town), TX | 2,999 |
| 14 | Rancho Viejo (town), TX | 2,838 |
| 15 | Santa Rosa (town), TX | 2,450 |
| 16 | Rio Hondo (city), TX | 2,021 |
| 17 | Encantada-Ranchito-El Calaboz (CDP), TX | 1,981 |
| 18 | Sebastian (CDP), TX | 1,684 |
| 19 | Palm Valley (city), TX | 1,413 |
| 20 | Palmer (CDP), TX | 1,082 |