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 |
|---|---|---|---|---|---|---|---|
| Rock Springs | 1 | 22,774 | 23,492 | -0.78% | 1,153 | 19.8 | City |
| Green River | 2 | 11,392 | 11,806 | -0.91% | 825 | 13.8 | City |
| North Rock Springs | 3 | 2,583 | 2,727 | 1.06% | 175 | 14.8 | CDP |
| Purple Sage | 4 | 548 | 764 | 0.18% | 1,666 | 0.3 | CDP |
| James Town | 5 | 503 | 632 | -0.59% | 157 | 3.2 | CDP |
| Clearview Acres | 6 | 445 | 994 | -5.32% | 371 | 1.2 | CDP |
| Eden | 7 | 228 | 132 | -1.72% | 17 | 13.5 | CDP |
| Farson | 8 | 201 | 211 | -3.83% | 8 | 23.9 | CDP |
| Wamsutter | 9 | 195 | 202 | -1.01% | 120 | 1.6 | Town |
| Superior | 10 | 180 | 187 | -1.1% | 161 | 1.1 | Town |
| Granger | 11 | 92 | 96 | -1.07% | 36 | 2.6 | Town |
| McKinnon | 12 | 89 | 65 | 8.54% | 15 | 5.9 | CDP |
| Arrowhead Springs | 13 | 84 | 121 | 7.69% | 73 | 1.2 | CDP |
| Point Rocks | 14 | 79 | 58 | 6.76% | 36 | 2.2 | CDP |
| Bairoil | 15 | 65 | 68 | -1.52% | 46 | 1.4 | Town |
| Washam | 16 | 55 | 67 | 7.84% | 18 | 3.1 | CDP |
| Little America | 17 | 24 | 29 | 4.35% | 9 | 2.7 | 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.
Rock Springs is the largest city in Sweetwater County.
Little America is the smallest city in Sweetwater County.
There are 17 cities in Sweetwater County, Wyoming.