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 |
|---|---|---|---|---|---|---|---|
| Farmington | 1 | 46,149 | 46,500 | -0.19% | 1,339 | 34.5 | City |
| Shiprock | 2 | 8,272 | 8,588 | -0.01% | 612 | 13.5 | CDP |
| Bloomfield | 3 | 7,330 | 7,405 | -0.26% | 395 | 18.5 | City |
| Aztec | 4 | 6,108 | 6,194 | -0.36% | 358 | 17.1 | City |
| Crouch Mesa | 5 | 5,640 | 4,626 | 7.7% | 273 | 20.7 | CDP |
| Lee Acres | 6 | 4,691 | 5,318 | -1.76% | 454 | 10.3 | CDP |
| Center Point | 7 | 3,005 | 2,726 | 7.67% | 327 | 9.2 | CDP |
| Flora Vista | 8 | 2,372 | 2,187 | 0.55% | 479 | 5.0 | CDP |
| West Hammond | 9 | 2,347 | 2,738 | -1.3% | 258 | 9.1 | CDP |
| La Plata | 10 | 2,305 | 2,078 | 5.54% | 104 | 22.2 | CDP |
| Angustura | 11 | 2,198 | 2,050 | 7.69% | 461 | 4.8 | CDP |
| South River | 12 | 1,848 | 2,248 | 7.69% | 217 | 8.5 | CDP |
| Upper Fruitland | 13 | 1,512 | 1,601 | -0.66% | 198 | 7.7 | CDP |
| Waterflow | 14 | 1,268 | 1,552 | -2.16% | 156 | 8.1 | CDP |
| Spencerville | 15 | 1,160 | 1,592 | -0.6% | 221 | 5.3 | CDP |
| Cedar Hill | 16 | 945 | 901 | 0.75% | 101 | 9.4 | CDP |
| North Light Plant | 17 | 766 | 860 | 3.37% | 354 | 2.2 | CDP |
| Napi Headquarters | 18 | 612 | 717 | -1.29% | 137 | 4.5 | CDP |
| Kirtland | 19 | 574 | 582 | -0.35% | 333 | 1.7 | Town |
| Totah Vista | 20 | 532 | 366 | 7.69% | 930 | 0.6 | CDP |
| Newcomb | 21 | 451 | 535 | 1.81% | 47 | 9.7 | CDP |
| Blanco | 22 | 434 | 465 | 0.93% | 71 | 6.1 | CDP |
| Fruitland | 23 | 401 | 610 | 7.51% | 205 | 2.0 | CDP |
| Nenahnezad | 24 | 396 | 470 | -5.04% | 113 | 3.5 | CDP |
| Sheep Springs | 25 | 382 | 397 | 2.69% | 75 | 5.1 | CDP |
| Ojo Amarillo | 26 | 354 | 529 | -7.81% | 180 | 2.0 | CDP |
| Navajo Dam | 27 | 338 | 378 | 1.2% | 28 | 12.1 | CDP |
| Nageezi | 28 | 324 | 266 | 0.62% | 23 | 14.1 | CDP |
| Middle Mesa | 29 | 285 | 168 | 7.95% | 42 | 6.7 | CDP |
| Crystal | 30 | 281 | 331 | -0.71% | 62 | 4.5 | CDP |
| Sanostee | 31 | 260 | 428 | -2.99% | 57 | 4.5 | CDP |
| Beclabito | 32 | 225 | 275 | -2.6% | 30 | 7.5 | CDP |
| Lake Valley | 33 | 114 | 96 | 7.55% | 14 | 8.3 | 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.
Farmington is the largest city in San Juan County.
Lake Valley is the smallest city in San Juan County.
There are 33 cities in San Juan County, New Mexico.