Demographics & People — Lake San Marcos, California
Population Overview
| Population (Census) | 4,996 |
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| Estimated 2026 | ~4,100 |
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| Median Age | 63.0 |
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| Total Households | 2,148 |
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| Family Households | 1,277 |
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| Average Household Size | 2.28 |
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| Diversity Index | 0.4453 (moderately diverse) |
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Race & Ethnicity
| White | 3,434 |
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| Black or African American | 51 |
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| Asian | 283 |
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| Hispanic or Latino | 1,081 |
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Heritage & Ancestry
| Group | Count |
|---|
| Other groups | 836 |
| English | 642 |
| German | 551 |
| Irish | 546 |
| Unclassified or not reported | 481 |
| Hispanic: Hispanic or Latino | 279 |
| American | 235 |
| French (except Basque) | 225 |
| Polish | 204 |
| Hispanic: Mexican | 187 |
Language
| English Only | 3,473 |
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| Spanish | 1,013 |
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| Population 5+ | 4,913 |
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Veterans
| Veterans | 510 |
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| Population 18+ | 3,704 |
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Commuting
| Mean Commute Time | 23.5 minutes |
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| Work from Home | 23.5% |
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| Commuter Profile | N/A |
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Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Lake San Marcos, California.
