Mill Valley

County:: Marin County
County Seat:: No
Area (mi²):: 4.782
State:: California

Mill Valley is a city located in Marin County, California. Mill Valley has a 2025 population of 13,519. Mill Valley is currently declining at a rate of -1% annually and its population has decreased by -4.8% since the most recent census, which recorded a population of 14,201 in 2020.

The average household income in Mill Valley is $308,154 with a poverty rate of 4.99%. The median age in Mill Valley is 47.2 years: 45.7 years for males, and 48.1 years for females.

Demographics

The racial composition of Mill Valley includes 83.28% White, 7.17% Asian, and smaller percentages for other race, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Asian

Two or more races

Other race

Black or African American

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	11,713	83.28%
Asian	1,009	7.17%
Two or more races	955	6.79%
Other race	242	1.72%
Black or African American	127	0.9%
Native American	18	0.13%
Native Hawaiian or Pacific Islander	0	0%

Mill Valley Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Mill Valley's average per capita income is $106,494. Household income levels show a median of $208,466. The poverty rate stands at 4.99%.

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	$383,458
Married Families	$250,001	-
Households	$208,466	$308,154
Non Families	$117,200	$146,021

$106,494

Average Income

$208,466

Median Household Income

4.99%

Poverty Rate