Mill Valley, California Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Mill Valley, California is 14,064 as of the 2023 American Community Survey, making it the 418th-largest city in California. The median household income is $208,466, the median home value is $2,000,001, and the median age is 47.2.
The population has declined 0.1% since 2010 (13,921 → 13,904).
14,064
Population
2941
People / sq mi
$208,466
Median Income
$2,000,001
Median Home Value
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Mill Valley covers 4.8 sq mi of land at 2941 people per square mile.
About Mill Valley, CA
In Mill Valley, home values do the distinguishing — a median of $2,000,001. With 14,064 residents, Mill Valley is a city in California.
Households here are among the highest-earning of all US cities: median income is $208,466, above the US median of $78,538. Poverty is among the lowest of comparable US cities, at 1.7% — below the national 12.4%. Home prices are steep, with the typical property valued at $2,000,001, with typical rent around $3,313.
Mill Valley is among the best-educated US cities: 77.1% of adults 25 and older hold a bachelor’s degree, above the national 35.0%. An unusually large 37.2% of workers are remote, above the national 14.0%, and the average commute runs about 25 minutes each way.
High housing values reframe the income picture in Mill Valley — even solid earnings stretch less against home prices and rents at this level.
Mill Valley city Population History (2010-2024)
The city of Mill Valley city had a population of 13,921 in 2010 and 13,904 in 2024, a -0.1% growth over 14 years. The peak was 14,379 in 2014. Average annual growth rate: -0.01%.
13,904
Population (2024)
13,921
Population (2010)
14,379
Peak (2014)
-0.01%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 13,921 |
| 2011 | 14,064 |
| 2012 | 14,157 |
| 2013 | 14,307 |
| 2014 | 14,379 |
| 2015 | 14,377 |
| 2016 | 14,351 |
| 2017 | 14,287 |
| 2018 | 14,296 |
| 2019 | 14,259 |
| 2020 | 14,203 |
| 2021 | 14,144 |
| 2022 | 13,975 |
| 2023 | 13,851 |
| 2024 | 13,904 |
Race & Ethnicity
| White | 83.3% |
| Black or African American | 0.9% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.5% |
| Two or More Races | 0.0% |
Economy & Income
$208,466
Median Household Income
$120,115
Per Capita Income
1.7%
Poverty Rate
5.2%
Unemployment Rate
Housing
$2,000,001
Median Home Value
$3,313
Median Rent
66.1%
Owner-Occupied
Education
98.9%
High School+
77.1%
Bachelor's+
Commute
2.6%
Drive Alone
49.4%
Public Transit
37.2%
Work From Home
25.2 min
Avg Commute
Community Profile
35.9%
Foreign Born
84.9%
Non-English at Home
3.4%
Veterans
7.8%
With Disability
97.0%
Health Insurance
99.6%
Internet Access
Employment by Industry
| Finance, Insurance & Real Estate | 26.5% |
| Professional, Scientific & Management | 18.6% |
| Information | 15.0% |
| Education, Health Care & Social Services | 7.4% |
| Arts, Entertainment & Food Services | 6.2% |
| Transportation & Warehousing | 6.0% |
| Manufacturing | 5.5% |
| Retail Trade | 3.0% |
| Public Administration | 2.4% |
| Construction | 1.8% |
| Agriculture & Mining | 0.4% |
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Frequently Asked Questions
Mill Valley, California has a population of 14,064 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 418th-largest city in California.
The median household income in Mill Valley, California is $208,466, with 1.7% of residents living below the federal poverty level.
The median home value in Mill Valley, California is $2,000,001, with median monthly rent at $3,313 and a homeownership rate of 66.1%.
The median age in Mill Valley, California is 47.2 years. The population is 47.9% male and 52.1% female.
The population has declined 0.1% since 2010 (13,921 → 13,904).
Mill Valley city, CA Climate
Mill Valley city, CA has an average annual temperature of 14°C (57°F) and receives about 1055 mm of precipitation per year. The warmest month is August and the coldest is January. Figures are 1970–2000 climate normals.
14°C
Avg Temp
1055
Precip (mm/yr)
Aug
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 10° / 49° | 219 mm |
| February | 11° / 52° | 184 mm |
| March | 12° / 53° | 156 mm |
| April | 13° / 56° | 62 mm |
| May | 15° / 58° | 21 mm |
| June | 16° / 61° | 6 mm |
| July | 17° / 63° | 2 mm |
| August | 18° / 64° | 3 mm |
| September | 18° / 64° | 11 mm |
| October | 16° / 62° | 55 mm |
| November | 13° / 55° | 150 mm |
| December | 10° / 50° | 186 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Mill Valley city, CA
The most comfortable months to visit Mill Valley city, CA are typically August, July and September, when temperatures are mildest and rainfall is relatively low. The hottest month is August (around 24°C high). The coldest is January (near 6°C low). January is usually the wettest month.
Where to stay near Mill Valley
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.