9 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Olivehurst | 1 | 18,356 | 15,149 | 1.73% | 2,182 | 8.41 | CDP |
| Marysville | 2 | 12,556 | 12,851 | -0.47% | 3,625 | 3.46 | City |
| Plumas Lake | 3 | 8,913 | 7,687 | 2.34% | 753 | 11.84 | CDP |
| Wheatland | 4 | 4,226 | 3,716 | 2.47% | 520 | 8.12 | City |
| Beale AFB | 5 | 1,054 | 955 | -1.68% | 104 | 10.09 | CDP |
| Challenge-Brownsville | 6 | 796 | 1,171 | -2.81% | 82 | 9.71 | CDP |
| Dobbins | 7 | 369 | 152 | -4.4% | 48 | 7.74 | CDP |
| Camptonville | 8 | 240 | 179 | 2.13% | 280 | 0.86 | CDP |
| Rackerby | 9 | 226 | 193 | 0.44% | 77 | 2.95 | CDP |
Olivehurst is the largest city in Yuba County, with a population of 18,356.
Rackerby is the smallest city in Yuba County.
There are 9 cities in Yuba County, California.