4 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Ukiah | 1 | 15,946 | 16,551 | -0.75% | 2,915 | 5 | City |
| Fort Bragg | 2 | 7,152 | 6,975 | 0.49% | 2,476 | 3 | City |
| Willits | 3 | 4,810 | 4,977 | -0.7% | 1,701 | 3 | City |
| Point Arena | 4 | 445 | 462 | -0.89% | 326 | 1 | City |
Ukiah is the largest city in Mendocino County, with a population of 15,946.
Point Arena is the smallest city in Mendocino County, with a population of 445.
There are 4 cities in Mendocino County, California.