13 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Yakima | 1 | 97,543 | 97,084 | 0.08% | 3,473 | 28 | City |
| Sunnyside | 2 | 16,277 | 16,396 | -0.12% | 2,155 | 8 | City |
| Grandview | 3 | 11,914 | 10,969 | 1.34% | 1,757 | 7 | City |
| Selah | 4 | 8,885 | 8,189 | 1.32% | 1,937 | 5 | City |
| Toppenish | 5 | 8,574 | 8,825 | -0.49% | 3,946 | 2 | City |
| Moxee | 6 | 4,990 | 4,393 | 2.04% | 2,106 | 2 | City |
| Wapato | 7 | 4,441 | 4,594 | -0.56% | 3,842 | 1 | City |
| Granger | 8 | 3,864 | 3,638 | 0.99% | 2,236 | 2 | City |
| Zillah | 9 | 3,099 | 3,170 | -0.39% | 1,702 | 2 | City |
| Mabton | 10 | 1,963 | 1,953 | 0.1% | 2,329 | 1 | City |
| Tieton | 11 | 1,722 | 1,386 | 3.36% | 1,993 | 1 | City |
| Naches | 12 | 1,095 | 1,080 | 0.27% | 1,257 | 1 | Town |
| Harrah | 13 | 575 | 578 | 0% | 2,106 | 0 | Town |
Yakima is the largest city in Yakima County, with a population of 97,543.
Harrah is the smallest city in Yakima County, with a population of 575.
There are 13 cities in Yakima County, Washington.