CDP in Marin County, California · 0.1 sq mi · 7,173 people per sq mi
About 900 people live in Alto. The typical household earns $129,191, and the median resident is 42.3 years old.
2026 projection
From 818 in 2020
Poverty rate 25.98%
Men 28.9 · Women 42.8
2011–2026
902
2026 projection
10.3% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
2011–2026
902
2026 projection
10.3% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 902 | +12 | 1.35% |
|---|---|---|---|
| 2025 | 890 | +24 | 1.38% |
| 2023 | 866 | +207 | 31.41% |
| 2022 | 659 | -241 | 26.78% |
| 2021 | 900 | +82 | 10.02% |
| 2020 | 818 | +207 | 33.88% |
| 2019 | 611 | -154 | 20.13% |
| 2018 | 765 | +14 | 1.86% |
| 2017 | 751 | +102 | 15.72% |
| 2016 | 649 | -86 | 11.70% |
Showing 10 of 15 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 10 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 4 residents
49% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 49% | 75% | 33% |
| Never married | 36% | 21% | 45% |
| Divorced | 5% | 0% | 8% |
| Widowed | 3% | 4% | 3% |
| Separated | 7% | 0% | 11% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau