3 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Raymondville | 1 | 10,051 | 10,218 | -0.28% | 2,443 | 4 | City |
| Lyford | 2 | 2,185 | 2,257 | -0.55% | 1,251 | 2 | City |
| San Perlita | 3 | 548 | 533 | 0.55% | 1,056 | 1 | City |
Raymondville is the largest city in Willacy County, with a population of 10,051.
San Perlita is the smallest city in Willacy County, with a population of 548.
There are 3 cities in Willacy County, Texas.