1 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Susanville | 1 | 10,340 | 16,396 | -8.89% | 1,306 | 8 | City |
Susanville is the largest city in Lassen County, with a population of 10,340.
Susanville is the smallest city in Lassen County, with a population of 10,340.
There is 1 city in Lassen County, California.