1 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Susanville | 1 | 11,349 | 16,396 | -8.17% | 1,433 | 8 | City |
Susanville is the largest city in Lassen County, with a population of 11,349.
Susanville is the smallest city in Lassen County, with a population of 11,349.
There is 1 city in Lassen County, California.