Demographics of San Anselmo town, California

San Anselmo town, California had 12,555 people on July 1, 2025, by the Census Bureau’s estimate: −254 since July 2020. Age, income, poverty, housing and origin below come from the survey, averaged over 2020–2024, each with its margin of error.

San Anselmo town, in four figures

12,555
Population: July 1, 2025, Vintage 2025 estimate. The survey’s 2020–⁠2024 figure is 12,679 ±37.; −2.0%
Change since July 2020: −254 people.; 45.6 ±3.3
Median age: ACS 2020–⁠2024.; $173,641 ±$17,464
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.

San Anselmo town, California's population shrank 2.0% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of San Anselmo town, 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).

Source: The Census Bureau

About this chart

The figures

San Anselmo town, California's population shrank 2.0% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of San Anselmo town, 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	12,809	100.0	100.0
2021	12,772	99.7	100.2
2022	12,629	98.6	100.7
2023	12,552	98.0	101.6
2024	12,607	98.4	102.5
2025	12,555	98.0	103.1

Population of San Anselmo town, California on July 1 of each year, Vintage 2025
July 1	Population	Change
2020	12,809	—
2021	12,772	−37
2022	12,629	−143
2023	12,552	−77
2024	12,607	+55
2025	12,555	−52

Age, 2020–2024

The median age is 45.6 ±3.3: for men 45.2 ±4.1 and for women 45.9 ±3.2. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in San Anselmo town by age, ACS 2020–2024
Age	People	Share	California	United States
Under 5	679 ±200	5.4% ±1.6	5.5% ±<0.1	5.6% ±<0.1
5 to 17	2,322 ±388	18.3% ±3.1	16.5% ±<0.1	16.3% ±<0.1
18 to 24	602 ±242	4.7% ±1.9	9.1% ±<0.1	9.1% ±<0.1
25 to 44	2,677 ±404	21.1% ±3.2	28.7% ±<0.1	26.9% ±<0.1
45 to 64	3,654 ±447	28.8% ±3.5	24.6% ±<0.1	24.8% ±<0.1
65 and over	2,745 ±363	21.6% ±2.9	15.7% ±<0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $173,641 ±$17,464, and income per person $104,254 ±$12,235, 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 San Anselmo town by income, ACS 2020–2024
Household income	Households	Share	California	United States
Under $25,000	490 ±176	9.4% ±3.3	12.5% ±0.1	14.6% ±<0.1
$25,000 to $49,999	393 ±146	7.5% ±2.8	13.3% ±0.1	16.7% ±<0.1
$50,000 to $74,999	338 ±135	6.5% ±2.6	13.0% ±0.1	15.5% ±<0.1
$75,000 to $99,999	421 ±158	8.1% ±3.0	11.6% ±0.1	12.6% ±<0.1
$100,000 to $149,999	664 ±193	12.7% ±3.6	17.8% ±0.1	17.5% ±<0.1
$150,000 to $199,999	652 ±244	12.5% ±4.6	11.3% ±0.1	9.6% ±<0.1
$200,000 or more	2,266 ±236	43.4% ±3.8	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 San Anselmo town by age, ACS 2020–2024
Age	Below poverty	Rate	California	United States
All ages	942 ±373	7.4% ±2.9	12.0% ±0.1	12.5% ±0.1
Under 18	45 to 373	1.6% to 12.4%	15.0% ±0.1	16.1% ±0.1
18 to 59	442 ±158	7.3% ±2.5	11.0% ±0.1	11.6% ±0.1
60 and over	291 ±137	8.1% ±3.7	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 San Anselmo town, ACS 2020–2024
Measure	San Anselmo town	California	United States
Housing units	5,498 ±323	14,644,735 ±1,665	143,775,355 ±10,234
Occupied	95.0% ±7.8	92.5% ±0.1	89.9% ±0.1
Vacant	2.3% to 7.7%	7.5% ±0.1	10.1% ±0.1
Owner occupied	68.4% ±3.4	55.9% ±0.3	65.2% ±0.3
Renter occupied	31.6% ±5.6	44.1% ±0.2	34.8% ±0.1
Median home value	$1,576,700 ±$70,899	$734,700 ±$1,307	$332,700 ±$236
Median gross rent	$2,797 ±$327	$2,036 ±$5	$1,413 ±$2
Median year built	1955 ±3	1976 ±1	1980 ±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%.

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 San Anselmo town by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	California	United States
Hispanic or Latino	1,327 ±444	10.5% ±3.5	40.2% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	9,411 ±603	74.2% ±4.8	33.8% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	0 to 356	0% to 2.8%	5.2% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	774 ±232	6.1% ±1.8	15.3% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 21	0% to 0.2%	0.3% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 27	0% to 0.2%	0.3% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 159	0% to 1.3%	0.6% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	921 ±312	7.3% ±2.5	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 San Anselmo town by place of birth and citizenship, ACS 2020–2024
Born	People	Share	California	United States
Born in the state	7,404 ±413	58.4% ±3.3	56.5% ±0.1	57.3% ±<0.1
Born in another state	3,718 ±367	29.3% ±2.9	15.0% ±0.1	26.9% ±<0.1
Born a citizen outside the states	131 to 557	1.0% to 4.4%	1.5% ±<0.1	1.7% ±<0.1
Born abroad	1,213 ±267	9.6% ±2.1	27.0% ±0.1	14.1% ±<0.1
Naturalized citizens	799 ±204	6.3% ±1.6	14.7% ±0.1	7.4% ±<0.1
Not citizens	414 ±138	3.3% ±1.1	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%.

San Anselmo town among the places of California

437th 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 San Anselmo town in population, ACS 2020–2024
Place	ACS 2020–⁠2024
Palos Verdes Estates city	12,925 ±44
Larkspur city	12,854 ±26
Solana Beach city	12,823 ±31
Kingsburg city	12,755 ±45
Marysville city	12,726 ±23
San Anselmo town	12,679 ±37
Bonita CDP	12,652 ±1,680
Lindsay city	12,643 ±24
Grover Beach city	12,604 ±45
Avocado Heights CDP	12,593 ±1,155
Mendota city	12,577 ±44

Rankings this appears in

No. 7 Places in California by median rent
No. 9 Places in California by median home value
No. 15 Places by median rent
No. 16 Places by median home value
No. 19 Places in California by per capita income
No. 20 Places in California by median household income

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

Compiled automatically from Census Bureau population estimates — incorporated places and New England towns and American Community Survey 5-year estimates — table-based Summary File by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 25, 2026