Alto ( Spanish for "Tall") is a

census-designated place A census-designated place (CDP) is a Place (United States Census Bureau), concentration of population defined by the United States Census Bureau for statistical purposes only. CDPs have been used in each decennial census since 1980 as the counte ...

adjacent to Mill Valley in Marin County,

California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...

. It lies at an elevation of 26 feet (8 m). The population was 732 at the 2020 census.

Geography

According to the

United States Census Bureau The United States Census Bureau, officially the Bureau of the Census, is a principal agency of the Federal statistical system, U.S. federal statistical system, responsible for producing data about the American people and American economy, econ ...

, the CDP covered an area of , all of it land.

Demographics

The 2020 United States census reported that Alto had a population of 732. The population density was . The racial makeup of Alto was 80.3%

White White is the lightest color and is achromatic (having no chroma). It is the color of objects such as snow, chalk, and milk, and is the opposite of black. White objects fully (or almost fully) reflect and scatter all the visible wa ...

, 0.3%

African American African Americans, also known as Black Americans and formerly also called Afro-Americans, are an Race and ethnicity in the United States, American racial and ethnic group that consists of Americans who have total or partial ancestry from an ...

, 0.3% Native American, 4.4% Asian, 0.1%

Pacific Islander Pacific Islanders, Pasifika, Pasefika, Pacificans, or rarely Pacificers are the peoples of the list of islands in the Pacific Ocean, Pacific Islands. As an ethnic group, ethnic/race (human categorization), racial term, it is used to describe th ...

, 3.6% from other races, and 11.1% from two or more races. Hispanic or Latino of any race were 7.8% of the population. The whole population lived in households. There were 294 households, out of which 34.0% included children under the age of 18, 51.0% were married-couple households, 5.8% were cohabiting couple households, 27.9% had a female householder with no partner present, and 15.3% had a male householder with no partner present. 28.9% of households were one person, and 9.5% were one person aged 65 or older. The average household size was 2.49. There were 193 families (65.6% of all households). The age distribution was 24.5% under the age of 18, 4.9% aged 18 to 24, 23.2% aged 25 to 44, 33.3% aged 45 to 64, and 14.1% who were 65years of age or older. The median age was 42.7years. For every 100 females, there were 98.4 males. There were 314 housing units at an average density of , of which 294 (93.6%) were occupied. Of these, 52.7% were owner-occupied, and 47.3% were occupied by renters.

Education

The community is in the Mill Valley Elementary School District and the Tamalpais Union High School District.
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References

{{authority control Census-designated places in Marin County, California Census-designated places in California