Cost of living in San Marcos, CA

San Marcos is a Census city in San Diego County, CA. ACS 2024 5-year population is 94,882. Median gross rent is $2,348 (ACS 2024 5-year, this place). Median home value is $868,000. Median household income is $109,377. Insurance is the NAIC state average; food is a USDA plan — no town indexes.