| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Gallup | 1 | 19,584 | 21,792 | -1.93% | 970 | 20 | City |
Gallup is the largest city in McKinley County, with a population of 19,584.
Gallup is the smallest city in McKinley County, with a population of 19,584.
There is 1 city in McKinley County, New Mexico.