4 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Ukiah | 1 | 15,825 | 16,551 | -0.76% | 2,893 | 5 | City |
| Fort Bragg | 2 | 7,188 | 6,975 | 0.5% | 2,488 | 3 | City |
| Willits | 3 | 4,777 | 4,977 | -0.69% | 1,690 | 3 | City |
| Point Arena | 4 | 442 | 462 | -0.67% | 324 | 1 | City |
Ukiah is the largest city in Mendocino County, with a population of 15,825.
Point Arena is the smallest city in Mendocino County, with a population of 442.
There are 4 cities in Mendocino County, California.