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 |
|---|---|---|---|---|---|---|---|
| Yuma | 1 | 101,964 | 97,540 | 1.1% | 842 | 121.0 | City |
| San Luis | 2 | 38,758 | 35,588 | 2.09% | 1,146 | 33.8 | City |
| Fortuna Foothills | 3 | 27,766 | 29,297 | 0.39% | 693 | 40.1 | CDP |
| Somerton | 4 | 14,715 | 14,231 | 0.83% | 2,023 | 7.3 | City |
| Avenue B C | 5 | 3,796 | 3,847 | -0.71% | 5,250 | 0.7 | CDP |
| Wellton | 6 | 2,635 | 2,383 | 2.45% | 91 | 29.0 | Town |
| Gadsden | 7 | 798 | 873 | 1.01% | 409 | 2.0 | CDP |
| Rancho Mesa Verde | 8 | 595 | 861 | -0.34% | 5,313 | 0.1 | CDP |
| Donovan Estates | 9 | 561 | 1,325 | -10.67% | 4,452 | 0.1 | CDP |
| Tacna | 10 | 511 | 580 | -1.35% | 266 | 1.9 | CDP |
| El Prado Estates | 11 | 372 | 590 | -2.62% | 384 | 1.0 | CDP |
| Yuma Proving Ground | 12 | 365 | 251 | 7.67% | 271 | 1.3 | CDP |
| Dateland | 13 | 328 | 411 | -2.09% | 15 | 22.0 | CDP |
| Wall Lane | 14 | 295 | 411 | -2.64% | 675 | 0.4 | CDP |
| Wellton Hills | 15 | 182 | 397 | -3.19% | 285 | 0.6 | CDP |
| Drysdale | 16 | 104 | 389 | -10.35% | 634 | 0.2 | CDP |
| Orange Grove Mobile Manor | 17 | 94 | 387 | -27.13% | 1,492 | 0.1 | CDP |
| Padre Ranchitos | 18 | 9 | 51 | -55% | 31 | 0.3 | 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.
Yuma is the largest city in Yuma County.
Padre Ranchitos is the smallest city in Yuma County.
There are 18 cities in Yuma County, Arizona.