Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | 2024 Pop. | 2020 Pop. | Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Las Vegas | 1 | 12,814 | 13,177 | -0.7% | 1,486 | 8.6 | City |
| Pecos | 2 | 1,378 | 1,386 | -0.14% | 776 | 1.8 | Village |
| San Jose | 3 | 870 | 750 | 1.4% | 481 | 1.8 | CDP |
| La Cueva | 4 | 810 | 463 | 7.71% | 105 | 7.7 | CDP |
| Rowe | 5 | 610 | 513 | 2.35% | 100 | 6.1 | CDP |
| Villanueva | 6 | 467 | 339 | 3.78% | 64 | 7.3 | CDP |
| Ribera | 7 | 316 | 501 | -2.17% | 126 | 2.5 | CDP |
| East Pecos | 8 | 275 | 545 | -11.29% | 76 | 3.6 | CDP |
| Soham | 9 | 247 | 132 | 0.82% | 160 | 1.5 | CDP |
| North San Ysidro | 10 | 223 | 47 | 1.83% | 97 | 2.3 | CDP |
| Sena | 11 | 163 | 187 | 1.88% | 77 | 2.1 | CDP |
| Conchas Dam | 12 | 140 | 120 | -2.78% | 17 | 8.3 | CDP |
| San Jose | 13 | 104 | 98 | -2.8% | 392 | 0.3 | CDP |
| Valencia | 14 | 100 | 161 | 7.53% | 65 | 1.6 | CDP |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Las Vegas is the largest city in San Miguel County.
Valencia is the smallest city in San Miguel County.
There are 14 cities in San Miguel County, New Mexico.