| County/ City | Population 1980 | Population 1990 | Percent Change 1980-1990 | Population 2000 | Percent Change 1990-2000 |
|---|---|---|---|---|---|
| Hidalgo County | 283,229 | 383,545 | 35.4 | 569,463 | 48.5 |
| Abram-Perezville CDP | - | 3,999 | - | 5,444 | 36.1 |
| Alamo City | 5,831 | 8,210 | 40.8 | 14,760 | 79.8 |
| Alton City | 2,732 | 3,069 | 12.3 | 4,384 | 42.8 |
| Donna City | 9,952 | 12,652 | 27.1 | 14,768 | 16.7 |
| Edcouch City | 3,092 | 2,878 | -6.9 | 3,342 | 16.1 |
| Edinburg City | 24,075 | 29,885 | 24.1 | 48,465 | 62.2 |
| Elsa City | 5,061 | 5,242 | 3.6 | 5,549 | 5.9 |
| Hidalgo City | 2,288 | 3,292 | 43.9 | 7,322 | 122.4 |
| La Homa CDP | - | 1,403 | - | 10,433 | 643.6 |
| La Joya city | 2,018 | 2,604 | 29.0 | 3,303 | 26.8 |
| La Villa city | - | 1,403 | - | 10,433 | 643.6 |
| Lopezville CDP | - | 2,827 | - | 4,476 | 58.3 |
| McAllen City | 66,279 | 84,021 | 26.8 | 106,414 | 26.7 |
| Mercedes City | 11,851 | 12,694 | 7.1 | 13,649 | 7.5 |
| Mila Doce CDP | - | 2,089 | - | 4,907 | 134.9 |
| Mission City | - | 2,089 | - | 4,907 | 134.9 |
| Palmhurst City | - | 2,089 | - | 4,907 | 134.9 |
| Palmview City | - | 2,089 | - | 4,907 | 134.9 |
| Penitas | - | 2,089 | - | 4,907 | 134.9 |
| Pharr city | - | 2,089 | - | 4,907 | 134.9 |
| Progreso | 1456 | 3,258 | 123.8 | 4,851 | 48.9 |
| Progreso Lakes | - | 154 | - | 234 | 51.9 |
| San Juan City | 7,608 | 10,815 | 42.2 | 26,229 | 142.5 |
| Scissors CDP | - | 1,513 | - | 2,805 | 85.4 |
| Sullivan City | - | 2,371 | - | 3,998 | 68.6 |
| Weslaco City | 19,331 | 21,877 | 13.2 | 26,935 | 23.1 |