| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| San Francisco | 1 | 812,530 | 875,139 | -1.64% | 17,399 | 47 | City |
San Francisco is the largest city in San Francisco County, with a population of 812,530.
San Francisco is the smallest city in San Francisco County, with a population of 812,530.
There is 1 city in San Francisco County, California.