La Mesa
- County:
- San Diego County
- County Seat:
- No
- Area (mi²):
- 9.092
- State:
- California
La Mesa is a city located in San Diego County, California. La Mesa has a 2026 population of 60,767. La Mesa is currently growing at a rate of 0.16% annually but its population has decreased by -0.54% since the most recent census, which recorded a population of 61,094 in 2020.