Demographics of Mill Valley city, California

Mill Valley city, California had 13,799 people on July 1, 2025, by the Census Bureau’s estimate: −407 since July 2020. Age, income, poverty, housing and origin below come from the survey, averaged over 2020–2024, each with its margin of error.

Mill Valley city, in four figures

13,799
Population: July 1, 2025, Vintage 2025 estimate. The survey’s 2020–⁠2024 figure is 14,012 ±26.; −2.9%
Change since July 2020: −407 people.; 48.7 ±2.8
Median age: ACS 2020–⁠2024.; $206,212 ±$10,740
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. The Bureau publishes no births, deaths or migration for a place, so the change is the difference between one July estimate and the next.

Mill Valley city, California's population shrank 2.9% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Mill Valley city, California's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — incorporated places and New England towns

About this chart

The figures

Mill Valley city, California's population shrank 2.9% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Mill Valley city, California's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	14,206	100.0	100.0
2021	14,150	99.6	100.2
2022	13,974	98.4	100.7
2023	13,842	97.4	101.6
2024	13,875	97.7	102.5
2025	13,799	97.1	103.1

Population of Mill Valley city, California on July 1 of each year, Vintage 2025
July 1	Population	Change
2020	14,206	—
2021	14,150	−56
2022	13,974	−176
2023	13,842	−132
2024	13,875	+33
2025	13,799	−76

Age, 2020–2024

The median age is 48.7 ±2.8: for men 45.7 ±3.2 and for women 50.1 ±2.2. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Mill Valley city by age, ACS 2020–2024
Age	People	Share	California	United States
Under 5	364 ±129	2.6% ±0.9	5.5% ±<0.1	5.6% ±<0.1
5 to 17	2,243 ±323	16.0% ±2.3	16.5% ±<0.1	16.3% ±<0.1
18 to 24	962 ±301	6.9% ±2.2	9.1% ±<0.1	9.1% ±<0.1
25 to 44	2,724 ±443	19.4% ±3.2	28.7% ±<0.1	26.9% ±<0.1
45 to 64	4,432 ±464	31.6% ±3.3	24.6% ±<0.1	24.8% ±<0.1
65 and over	3,287 ±427	23.5% ±3.1	15.7% ±<0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $206,212 ±$10,740, and income per person $118,725 ±$10,849, in 2024 dollars. The median is $99,122 ±$310 in California and $80,734 ±$166 in the United States.

Households by income

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Households in Mill Valley city by income, ACS 2020–2024
Household income	Households	Share	California	United States
Under $25,000	434 ±153	7.6% ±2.7	12.5% ±0.1	14.6% ±<0.1
$25,000 to $49,999	331 ±146	5.8% ±2.5	13.3% ±0.1	16.7% ±<0.1
$50,000 to $74,999	380 ±146	6.7% ±2.5	13.0% ±0.1	15.5% ±<0.1
$75,000 to $99,999	299 ±147	5.3% ±2.6	11.6% ±0.1	12.6% ±<0.1
$100,000 to $149,999	806 ±207	14.2% ±3.6	17.8% ±0.1	17.5% ±<0.1
$150,000 to $199,999	406 ±130	7.1% ±2.3	11.3% ±0.1	9.6% ±<0.1
$200,000 or more	3,032 ±279	53.3% ±4.1	20.5% ±0.1	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Mill Valley city by age, ACS 2020–2024
Age	Below poverty	Rate	California	United States
All ages	826 ±290	5.9% ±2.1	12.0% ±0.1	12.5% ±0.1
Under 18	26 to 198	1.0% to 7.6%	15.0% ±0.1	16.1% ±0.1
18 to 59	181 to 635	2.5% to 8.8%	11.0% ±0.1	11.6% ±0.1
60 and over	142 to 470	3.5% to 11.2%	11.5% ±0.1	11.0% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Housing, 2020–2024

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Housing in Mill Valley city, ACS 2020–2024
Measure	Mill Valley city	California	United States
Housing units	6,418 ±314	14,644,735 ±1,665	143,775,355 ±10,234
Occupied	88.6% ±1.2	92.5% ±0.1	89.9% ±0.1
Vacant	11.4% ±3.9	7.5% ±0.1	10.1% ±0.1
Owner occupied	66.2% ±3.5	55.9% ±0.3	65.2% ±0.3
Renter occupied	33.8% ±5.0	44.1% ±0.2	34.8% ±0.1
Median home value	At the edge of the top or bottom interval	$734,700 ±$1,307	$332,700 ±$236
Median gross rent	$3,278 ±$682	$2,036 ±$5	$1,413 ±$2
Median year built	1958 ±4	1976 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Mill Valley city by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	California	United States
Hispanic or Latino	668 ±211	4.8% ±1.5	40.2% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	11,224 ±427	80.1% ±3.0	33.8% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	0 to 204	0% to 1.5%	5.2% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	1,165 ±300	8.3% ±2.1	15.3% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 21	0% to 0.1%	0.3% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 21	0% to 0.1%	0.3% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	25 to 305	0.2% to 2.2%	0.6% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	691 ±246	4.9% ±1.8	4.4% ±<0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Mill Valley city by place of birth and citizenship, ACS 2020–2024
Born	People	Share	California	United States
Born in the state	5,964 ±499	42.6% ±3.6	56.5% ±0.1	57.3% ±<0.1
Born in another state	5,231 ±508	37.3% ±3.6	15.0% ±0.1	26.9% ±<0.1
Born a citizen outside the states	93 to 341	0.7% to 2.4%	1.5% ±<0.1	1.7% ±<0.1
Born abroad	2,600 ±490	18.6% ±3.5	27.0% ±0.1	14.1% ±<0.1
Naturalized citizens	1,783 ±387	12.7% ±2.8	14.7% ±0.1	7.4% ±<0.1
Not citizens	817 ±338	5.8% ±2.4	12.3% ±0.1	6.8% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Mill Valley city among the places of California

416th of 661 places of 5,000 or more by the survey’s 2020–2024 count. Every one is listed on the California page.

Places of California near Mill Valley city in population, ACS 2020–2024
Place	ACS 2020–⁠2024
McFarland city	14,222 ±23
Susanville city	14,177 ±33
Los Osos CDP	14,166 ±1,061
Cherryland CDP	14,143 ±1,273
Grass Valley city	14,113 ±25
Mill Valley city	14,012 ±26
Isla Vista CDP	13,920 ±1,069
Salida CDP	13,900 ±1,379
Auburn city	13,768 ±35
Oak Park CDP	13,757 ±1,242
Hawaiian Gardens city	13,691 ±26

Sources

Census Bureau population estimates — incorporated places and New England towns — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026