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Alto, CA
Census-designated place in Marin County, California.
Population
1,024
Land area
0.1sq mi
People per sq mi
8,143
ZIP codes
0
Alto and its ZIP codes
Alto at a glance
- Alto is about 32 times as dense as California as a whole.
- The median household income is $129,191, 30% above the California median of $99,122.
Housing and community stats
Alto, CA, American Community Survey 2020-2024
Median household income
$129,191
Poverty rate
26.0%
Homeownership
47.0%
Bachelor's or higher
67.1%
Median age
42.3
Average commute
14.1 min
Largest reported origins and ancestries: Irish Americans (134), German Americans (120), Guatemalan Americans (119).
Economy and federal money
Jobs, pay, income and spending are for Marin County. PPP loans are for Alto.
Unemployment rate
4.4%
Aug 2026, -0.2 pts in a year
Average annual pay
$94,975
110,071 jobs, 2025
Income per person
$190,891
BEA, 2024
Federal spending
$2B
FY 2026, $7,499 per person
How people get to work
Alto, CA, workers 16 and older. American Community Survey 5-year estimates
- Drove alone82.8%
- Carpooled0.0%
- Public transit0.0%
- Walked0.0%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other0.0%
- Worked from home17.2%
Average one-way commute: 14.1 minutes for people who do not work from home.
Environment and hazard risk
Alto, CA, from FEMA, NOAA and EPA
Natural hazard risk
Relatively High
Top: landslide
Storm events since 1996
549
Countywide, mostly strong wind
Flood insurance policies
4,542
5.4% of homes, county
July high / Jan low
83° / 42°F
44.4 inches of rain a year
Health statistics
Share of adults in Alto, CA, CDC PLACES estimates
Obesity
21.8%
U.S. 33.3% -11.5 pts
Diabetes
8.3%
U.S. 12.1% -3.8 pts
Smoking
8.4%
U.S. 12.8% -4.4 pts
Uninsured (18-64)
3.6%
U.S. 11.1% -7.5 pts
Cities near Alto
| Name | Distance | Land area (sq mi) |
|---|---|---|
| StrawberryCensus-designated place | 0.9 mi | 1.3 |
| Corte MaderaTown | 1.4 mi | 3.2 |
| Mill ValleyCity | 1.6 mi | 4.8 |
| TiburonTown | 1.9 mi | 4.5 |
| Tamalpais-Homestead ValleyCensus-designated place | 2 mi | 4.7 |
| Marin CityCensus-designated place | 2.3 mi | 0.5 |
| LarkspurCity | 2.6 mi | 3 |
| SausalitoCity | 3.5 mi | 1.8 |
| BelvedereCity | 3.5 mi | 0.5 |
| KentfieldCensus-designated place | 3.7 mi | 3 |
| Muir BeachCensus-designated place | 4.7 mi | 0.5 |
| RossTown | 4.7 mi | 1.6 |
| San RafaelCity | 5.7 mi | 16.6 |
| San AnselmoTown | 6.2 mi | 2.7 |
| Stinson BeachCensus-designated place | 6.6 mi | 0.9 |
| Santa VenetiaCensus-designated place | 7.1 mi | 3.7 |
Frequently asked questions
- What county is Alto, CA in?
- Alto is in Marin County, California.
- What is the population of Alto, CA?
- About 1,024 people live in Alto, based on American Community Survey 5-year estimates.
- What cities are near Alto?
- Nearby places include Strawberry (0.9 mi), Corte Madera (1.4 mi), Mill Valley (1.6 mi), Tiburon (1.9 mi), Tamalpais-Homestead Valley (2 mi).
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023