9 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Fernley | 1 | 26,128 | 22,896 | 2.43% | 213 | 123 | City |
| Fernley | 2 | 26,128 | 23,026 | 2.43% | 213 | 123 | City |
| Dayton | 3 | 17,028 | 14,258 | 3.26% | 488 | 35 | CDP |
| Silver Springs | 4 | 5,072 | 4,910 | -0.29% | 71 | 72 | CDP |
| Yerington | 5 | 3,223 | 3,101 | 0.75% | 109 | 29 | City |
| Yerington | 6 | 3,223 | 3,103 | 0.75% | 109 | 29 | City |
| Stagecoach | 7 | 1,912 | 2,436 | 0.16% | 229 | 8 | CDP |
| Smith Valley | 8 | 1,657 | 1,711 | 0.24% | 16 | 102 | CDP |
| Silver City | 9 | 131 | 115 | 7.38% | 135 | 1 | CDP |
Fernley is the largest city in Lyon County, with a population of 26,128.
Silver City is the smallest city in Lyon County, with a population of 131.
There are 9 cities in Lyon County, Nevada.