Alto Flag

Alto

County:
Marin County
County Seat:
No
Area (mi²):
0.126
State:
California

Alto is a CDP located in Marin County, California. Alto has a 2026 population of 902. Alto is currently growing at a rate of 1.35% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.

The median household income in Alto is $129,191 with a poverty rate of 25.98%. The median age in Alto is 42.3 years: 28.9 years for males, and 42.8 years for females. For every 100 females there are 74.4 males.

902
Total Population
7,173
Density (mi²)
12 1.35%
Growth

Alto Population

Alto Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026902121.35%
2025890121.37%

Median Age

Overall: 42.3 years
Female: 42.8 years
Male: 28.9 years

Alto Adults

There are 775 adults, (100 of whom are seniors) in Alto.

Sex Ratio

Female: 587 (57.3%)
Male: 437 (42.7%)

Demographics

The racial composition of Alto includes 80.57% White, 5.66% Asian, and smaller percentages for Black or African American, other race and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White82580.57%
Two or more races11911.62%
Asian585.66%
Black or African American151.46%
Other race70.68%
Race
Population ↓
Percentage (of total)
Two or more races11911.62%
Other race70.68%
Race
Population ↓
Percentage (of total)
White82580.57%
Asian585.66%
Black or African American151.46%

Alto Marital Status

Economics and Income Statistics

Alto 's average per capita income is $83,333. Household income levels show a median of $129,191. The poverty rate stands at 25.98%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median ↓
Mean
Married Families$239,485-
Households$129,191$178,543
Families-$204,423
Non Families-$58,526

$83,333

Average Income

$129,191

Median Household Income

25.98%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)