1 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mertzon | 1 | 764 | 751 | 0.26% | 503 | 2 | City |
Mertzon is the largest city in Irion County, with a population of 764.
Mertzon is the smallest city in Irion County, with a population of 764.
There is 1 city in Irion County, Texas.