
San Mateo
- County:
- Cibola County
- County Seat:
- No
- Area (mi²):
- 2.774
- State:
- New Mexico
San Mateo is a CDP located in Cibola County, New Mexico. San Mateo has a 2025 population of 9. San Mateo is currently declining at a rate of -57.14% annually and its population has decreased by -95.38% since the most recent census, which recorded a population of 195 in 2020.
The average household income in San Mateo is $57,039 with a poverty rate of 0%. The median age in San Mateo is 25.7 years: 50.7 years for males, and 25.5 years for females.