7 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Stockton | 1 | 325,976 | 320,971 | 0.31% | 5,150 | 63 | City |
| Tracy | 2 | 101,765 | 93,618 | 1.63% | 3,864 | 26 | City |
| Manteca | 3 | 96,849 | 84,061 | 2.71% | 4,379 | 22 | City |
| Lodi | 4 | 69,192 | 66,440 | 0.8% | 5,058 | 14 | City |
| Lathrop | 5 | 43,794 | 29,123 | 7.18% | 2,209 | 20 | City |
| Ripon | 6 | 16,284 | 16,121 | 0.2% | 3,058 | 5 | City |
| Escalon | 7 | 7,448 | 7,471 | -0.07% | 3,270 | 2 | City |
Stockton is the largest city in San Joaquin County, with a population of 325,976.
Escalon is the smallest city in San Joaquin County, with a population of 7,448.
There are 7 cities in San Joaquin County, California.