Mill Valley

14,231

Total Population in 2020

In 2020, Mill Valley was home to 14,231 people. Residents were a majority working age, while those 65 and older were a larger segment of the community than those under 18. The population was predominantly white, with more women than men.

Most Populous Demographics

Category	Demographic	Total	Percentage
Age	18-64	7,673	54%
Sex	Female	7,581	53%
Race and Hispanic or Latino	White (Not Hispanic or Latino)	11,439	80%

Age

48.7

Median Age

In 2020, Mill Valley's population was a majority working-age adults, while those 65 and older were a moderately larger share of the community than those under age 18. Looking at 10-year age ranges, 50-59 was the largest group.

Population by Age Range

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Population by Age Group

3,202

Under 18

7,673

18-64

3,356

65 and over

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Table: Population by Age Range

Age Range	Population in Mill Valley
Age Range	Total	Percentage
0-9	1,419	10%
10-19	2,093	15%
20-29	783	6%
30-39	1,149	8%
40-49	2,046	14%
50-59	2,378	17%
60-69	1,922	14%
70-79	1,510	11%
80+	931	7%

Table: Population by Age Group

Age Group	Population in Mill Valley
Age Group	Total	Percentage
Under 18	3,202	23%
18-64	7,673	54%
65 and over	3,356	24%

* For both charts above, the data is collected from the U.S. Census Bureau Decennial Data 2020, Demographic and Housing Characteristics File (DHC), P12 Sex by Age for Selected Age Categories.

Sex and Age

In 2020, females outnumbered males by a significant amount in Mill Valley. Females 50-59 were the largest group by age, followed by males 50-59 and females 40-49. The biggest gap was in the 40-49 age group, where females were the larger share.

Population by Sex

6,650

Male

7,581

Female

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Population by Sex and Age

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Male

Female

Table: Population by Sex

Sex	Mill Valley
Sex	Total	Percentage
Male	6,650	47%
Female	7,581	53%

Table: Population by Sex and Age

Sex and Age	Mill Valley
Sex and Age	Total	Percentage
Male	6,650	47%
Male: 0-9	725	5%
Male: 10-19	1,062	7%
Male: 20-29	377	3%
Male: 30-39	503	4%
Male: 40-49	929	7%
Male: 50-59	1,146	8%
Male: 60-69	874	6%
Male: 70-79	662	5%
Male: 80+	372	3%
Female	7,581	53%
Female: 0-9	694	5%
Female: 10-19	1,031	7%
Female: 20-29	406	3%
Female: 30-39	646	5%
Female: 40-49	1,117	8%
Female: 50-59	1,232	9%
Female: 60-69	1,048	7%
Female: 70-79	848	6%
Female: 80+	559	4%

* For both charts above, the data is collected from the U.S. Census Bureau Decennial Data 2020, Demographic and Housing Characteristics File (DHC), P12 Sex by Age for Selected Age Categories.

Race and Hispanic or Latino

80%

White (Not Hispanic or Latino)

In 2020, Mill Valley had a predominantly white population. other/multiracial residents also made up a notable segment of the community, while Hispanic and Asian people were the next largest groups.

Population by Race and Hispanic or Latino

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Table: Population by Race and Hispanic or Latino

Race and Hispanic or Latino	Population in Mill Valley
Race and Hispanic or Latino	Total	Percentage
White	11,439	80%
Black or African American	122	<1%
American Indian / Alaska Native	18	<1%
Asian	846	6%
Native Hawaiian / Pacific Islander	10	<1%
Other / Multi-racial	937	7%
Hispanic or Latino (any race)	859	6%

* Categorized as Not Hispanic. This means that all the racial groups marked with an asterisk — White, Black or African American, American Indian / Alaska Native, Asian, Native Hawaiian / Pacific Islander, and Other / Multi-racial — do not include individuals who identify as Hispanic or Latino. The "Hispanic or Latino (any race)" category is separate, as Hispanic/Latino is considered an ethnicity rather than a racial category. For the chart above, the data is collected from the U.S. Census Bureau Decennial Data 2020, Demographic and Housing Characteristics File (DHC), P5 Hispanic or Latino Origin by Race.