Demographics & People
830,235 people call San Francisco home, in 363,970 households. Population shrank 0.7% from 836,321 (2022) to 830,235 (2024). Median age 40.0 years. (2.4y older than California). Children under 18 are 14% of the population. Population is 37% White (non-Hispanic) and 35% Asian. The community is highly diverse (Simpson index 0.66). 46% of households are family-led. County is losing 21,940 residents per year (2022-2023). County health: 18% adult obesity, 9% smoke.
- 2.3 people per household (vs California avg 2.9).
- 54% non-family households (singles, roommates) (vs California 29%).
- 46 dependents per 100 working-age (youth + seniors / 18-64) (vs California 60).
Population & Trend
Population shrank 0.7% from 836,321 (2022) to 830,235 (2024). Estimated 2026 population: ~824,185 (extrapolated at -0.4%/yr trend). Census Bureau Vintage estimate: 816,143.
| Census data vintage | 2024 |
|---|---|
| County Population | 873,965 people |
| Annual growth rate · Population change | -0.7% |
| Annual growth rate · Population (2022) | 836,321 |
| Annual growth rate · Population (2024) | 830,235 |
| Annual growth rate · Trend category | stable |
| Population | 830,235 people (vs California 109,857) |
| Population Estimate | 816,143 |
Sources: U.S. Census Bureau, ACS 5-Year · U.S. Census Bureau, ACS 5-Year DP05 · U.S. Census Bureau, Vintage Population Estimates · Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 40.0y is 1.1 years older than the U.S. median (38.9y). Children under 18 make up 14% — below the U.S. share of ~22%.
| Age Summary · Median age | 40.0 years (vs California 37.2y) |
|---|---|
| Age Summary · Children Pct | 13.7% |
| Age Summary · Character | established |
| Age Summary · Total Pop | 830,235 |
| Age Summary · Under 18 | 113,508 |
| Age Summary · 18 To 34 | 225,830 |
| Age Summary · 35 To 64 | 344,387 |
| Age Summary · 65 Plus | 146,510 |
| Median age | 40.0 years (vs California 37.2y) |
Sources: Census ACS 5-Year 2024 — place-level B01001 query · Census ACS 5-Year 2023 · Refreshed 2026-04-29
Race, Ethnicity & Diversity
Of 830,235 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.66 (0 = single group, 1 = perfectly even distribution); this is read as highly diverse.
| Diversity Index · Diversity index (Simpson) | 66.2% |
|---|---|
| Diversity Index · Diversity label | highly diverse |
| Diversity Index · Groups counted | 4 |
| Diversity Index · Largest group share | 42.0% |
| Asian population | 34.9% (vs California 11.9%) |
| Black population | 4.7% (vs California 4.3%) |
| Hispanic or Latino population | 16.2% (vs California 37.7%) |
| White (non-Hispanic) population | 36.8% (vs California 28.1%) |
Sources: U.S. Census Bureau, ACS 5-Year DP05 · Census ACS 5-Year 2023 · Refreshed 2026-04-12
Ancestry
Self-reported ancestry from Census ACS — what residents report as their ethnic origin, separate from race. Counts can exceed population because people can list multiple ancestries.
Top (1)
Sources: Census ACS 2022 B04006+B03001+B02001
Households & Family Composition
363,970 households. Averaging 2.2 people each — smaller than the U.S. average of 2.5. 46% are family households — below the U.S. share of ~65%. Of 169,671 families, 27% are married couples with children.
| Family households | 168,501 households (vs California 24,803) |
|---|---|
| Households that are families | 46.3% (vs California 71.1%) |
| Total households | 363,970 households (vs California 37,381) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Residential Stability & Migration
How long residents have lived here and where they came from. 15.7% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is losing 21,940 residents per year on net (IRS migration data).
| Migration · People moving in (annual) | 710,024 |
|---|---|
| Migration · People moving out (annual) | 731,964 |
| Migration · Net migration (in − out) | -21,940 |
Sources: IRS SOI Migration 2021-2022 · Refreshed 2026-04-12