14 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Las Vegas | 1 | 12,723 | 13,177 | -0.71% | 1,476 | 8.62 | City |
| Pecos | 2 | 1,376 | 1,386 | -0.15% | 775 | 1.77 | Village |
| San Jose | 3 | 882 | 750 | 1.38% | 488 | 1.81 | CDP |
| La Cueva | 4 | 868 | 463 | 7.16% | 113 | 7.68 | CDP |
| Rowe | 5 | 624 | 513 | 2.3% | 102 | 6.11 | CDP |
| Villanueva | 6 | 484 | 339 | 3.64% | 67 | 7.26 | CDP |
| Ribera | 7 | 308 | 501 | -2.53% | 122 | 2.52 | CDP |
| Soham | 8 | 250 | 132 | 1.21% | 162 | 1.55 | CDP |
| East Pecos | 9 | 241 | 545 | -12.36% | 67 | 3.60 | CDP |
| North San Ysidro | 10 | 228 | 47 | 2.24% | 99 | 2.30 | CDP |
| Sena | 11 | 165 | 187 | 1.23% | 78 | 2.13 | CDP |
| Conchas Dam | 12 | 137 | 120 | -2.14% | 16 | 8.32 | CDP |
| Valencia | 13 | 108 | 161 | 8% | 70 | 1.55 | CDP |
| San Jose | 14 | 102 | 98 | -1.92% | 385 | 0.27 | CDP |
Las Vegas is the largest city in San Miguel County, with a population of 12,723.
San Jose is the smallest city in San Miguel County.
There are 14 cities in San Miguel County, New Mexico.