San Ysidro
- County:
- Sandoval County
- County Seat:
- No
- Area (mi²):
- 2.338
- State:
- New Mexico
San Ysidro is a village located in Sandoval County, New Mexico. San Ysidro has a 2026 population of 171. San Ysidro is currently declining at a rate of 0% annually and its population has increased by 2.4% since the most recent census, which recorded a population of 167 in 2020.