| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Ukiah | 1 | 15,947 | 16,540 | -0.75% | 2,915 | 5 | City |
| Fort Bragg | 2 | 6,959 | 6,971 | 0.19% | 2,409 | 3 | City |
| Willits | 3 | 4,721 | 4,978 | -0.82% | 1,670 | 3 | City |
| Point Arena | 4 | 450 | 462 | -0.66% | 329 | 1 | City |
Ukiah is the largest city in Mendocino County, with a population of 15,947.
Point Arena is the smallest city in Mendocino County, with a population of 450.
There are 4 cities in Mendocino County, California.