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 and multiracial populations.

Population by Race

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%

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