18 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Truckee | 1 | 17,221 | 16,766 | 0.53% | 533 | 32.33 | Town |
| North Auburn | 2 | 14,748 | 14,446 | 0.79% | 1,894 | 7.79 | CDP |
| Grass Valley | 3 | 14,065 | 14,087 | -0.03% | 2,346 | 6 | City |
| Alta Sierra | 4 | 7,553 | 7,620 | 0.56% | 908 | 8.32 | CDP |
| Lake Wildwood | 5 | 4,970 | 4,709 | -0.02% | 1,625 | 3.06 | CDP |
| Lake Pines | 6 | 4,900 | 4,350 | 1.37% | 1,939 | 2.53 | CDP |
| Nevada City | 7 | 3,274 | 3,148 | 0.77% | 1,458 | 2.25 | City |
| Cedar Ridge | 8 | 1,780 | 1,267 | 2.53% | 228 | 7.81 | CDP |
| Penn Valley | 9 | 1,080 | 1,073 | -3.23% | 509 | 2.12 | CDP |
| Rough Ready | 10 | 538 | 511 | -4.95% | 170 | 3.17 | CDP |
| Smartsville | 11 | 429 | 487 | 3.87% | 598 | 0.72 | CDP |
| Washington | 12 | 100 | 137 | -5.66% | 53 | 1.90 | CDP |
| Pike | 13 | 88 | 120 | -3.3% | 20 | 4.32 | CDP |
| Kingvale | 14 | 71 | 102 | -5.33% | 74 | 0.96 | CDP |
| North San Juan | 15 | 69 | 151 | -15.85% | 28 | 2.42 | CDP |
| Soda Springs | 16 | 68 | 46 | 7.94% | 202 | 0.34 | CDP |
| Floriston | 17 | 29 | 28 | 7.41% | 31 | 0.95 | CDP |
| Graniteville | 18 | 15 | 14 | 7.14% | 10 | 1.49 | CDP |
Truckee is the largest city in Nevada County, with a population of 17,221.
Graniteville is the smallest city in Nevada County.
There are 18 cities in Nevada County, California.