1 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| San Francisco | 1 | 815,701 | 874,826 | -1.43% | 17,467 | 47 | City |
San Francisco is the largest city in San Francisco County, with a population of 815,701.
San Francisco is the smallest city in San Francisco County, with a population of 815,701.
There is 1 city in San Francisco County, California.