San Leandro
- County:
- Alameda County
- County Seat:
- No
- Area (mi²):
- 13.323
- State:
- California
San Leandro is a city located in Alameda County, California. San Leandro has a 2026 population of 86,571. San Leandro is currently growing at a rate of 0.02% annually but its population has decreased by -4.58% since the most recent census, which recorded a population of 90,727 in 2020.