| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Yakima | 1 | 97,573 | 97,032 | 0.12% | 3,474 | 28 | City |
| Sunnyside | 2 | 16,414 | 16,400 | -0.1% | 2,173 | 8 | City |
| Grandview | 3 | 12,227 | 10,966 | 1.37% | 1,804 | 7 | City |
| Selah | 4 | 8,797 | 8,245 | 1.37% | 1,918 | 5 | City |
| Toppenish | 5 | 8,597 | 8,825 | -0.44% | 3,956 | 2 | City |
| Moxee | 6 | 4,866 | 4,392 | 2.12% | 2,054 | 2 | City |
| Wapato | 7 | 4,445 | 4,592 | -0.54% | 3,845 | 1 | City |
| Granger | 8 | 3,869 | 3,640 | 0.99% | 2,239 | 2 | City |
| Zillah | 9 | 3,101 | 3,168 | -0.32% | 1,703 | 2 | City |
| Mabton | 10 | 1,969 | 1,957 | 0.1% | 2,336 | 1 | City |
| Tieton | 11 | 1,713 | 1,383 | 3.38% | 1,983 | 1 | City |
| Naches | 12 | 1,086 | 1,078 | 0.28% | 1,247 | 1 | Town |
| Harrah | 13 | 593 | 579 | 0% | 2,172 | 0 | Town |
Yakima is the largest city in Yakima County, with a population of 97,573.
Harrah is the smallest city in Yakima County, with a population of 593.
There are 13 cities in Yakima County, Washington.