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 2025 population of 646. Alto is currently declining at a rate of -0.62% annually and its population has decreased by -21.03% since the most recent census, which recorded a population of 818 in 2020.

The average household income in Alto is $267,620 with a poverty rate of 4.16%. The median age in Alto is 45.4 years: 28.9 years for males, and 50.1 years for females.

Demographics

The racial composition of Alto includes 77.83% White, 9.24% Asian, and smaller percentages for Black or African American, other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Asian

Black or African American

Other race

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	674	77.83%
Two or more races	89	10.28%
Asian	80	9.24%
Black or African American	16	1.85%
Other race	7	0.81%
Native American	0	0%
Native Hawaiian or Pacific Islander	0	0%

Alto Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Alto's average per capita income is $89,881. Household income levels show a median of $0. The poverty rate stands at 4.16%.

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
Families	$250,001	$314,589
Married Families	$250,001	-
Households	-	$267,620
Non Families	-	$90,052

$89,881

Average Income

$0

Median Household Income

4.16%

Poverty Rate