Demographics of San Dimas city, California

San Dimas city, California had 32,978 people on July 1, 2025, by the Census Bureau’s estimate: −1,822 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 Dimas city, in four figures

32,978
Population: July 1, 2025, Vintage 2025 estimate. The survey’s 2020–⁠2024 figure is 33,789 ±81.; −5.2%
Change since July 2020: −1,822 people.; 43.3 ±2.4
Median age: ACS 2020–⁠2024.; $105,321 ±$18,690
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 Dimas city, California's population shrank 5.2% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of San Dimas 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).

Source: The Census Bureau

About this chart

The figures

San Dimas city, California's population shrank 5.2% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of San Dimas 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	34,800	100.0	100.0
2021	34,090	98.0	100.2
2022	33,620	96.6	100.7
2023	33,350	95.8	101.6
2024	33,216	95.4	102.5
2025	32,978	94.8	103.1

Population of San Dimas city, California on July 1 of each year, Vintage 2025
July 1	Population	Change
2020	34,800	—
2021	34,090	−710
2022	33,620	−470
2023	33,350	−270
2024	33,216	−134
2025	32,978	−238

Age, 2020–2024

The median age is 43.3 ±2.4: for men 43.3 ±2.7 and for women 43.4 ±3.5. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in San Dimas city by age, ACS 2020–2024
Age	People	Share	California	United States
Under 5	1,875 ±441	5.5% ±1.3	5.5% ±<0.1	5.6% ±<0.1
5 to 17	4,933 ±620	14.6% ±1.8	16.5% ±<0.1	16.3% ±<0.1
18 to 24	2,427 ±370	7.2% ±1.1	9.1% ±<0.1	9.1% ±<0.1
25 to 44	8,177 ±892	24.2% ±2.6	28.7% ±<0.1	26.9% ±<0.1
45 to 64	9,511 ±862	28.1% ±2.6	24.6% ±<0.1	24.8% ±<0.1
65 and over	6,866 ±592	20.3% ±1.8	15.7% ±<0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $105,321 ±$18,690, and income per person $51,207 ±$3,332, 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 Dimas city by income, ACS 2020–2024
Household income	Households	Share	California	United States
Under $25,000	1,225 ±323	10.1% ±2.6	12.5% ±0.1	14.6% ±<0.1
$25,000 to $49,999	1,588 ±352	13.2% ±2.9	13.3% ±0.1	16.7% ±<0.1
$50,000 to $74,999	1,420 ±341	11.8% ±2.8	13.0% ±0.1	15.5% ±<0.1
$75,000 to $99,999	1,566 ±474	13.0% ±3.9	11.6% ±0.1	12.6% ±<0.1
$100,000 to $149,999	2,067 ±379	17.1% ±3.1	17.8% ±0.1	17.5% ±<0.1
$150,000 to $199,999	1,525 ±279	12.6% ±2.3	11.3% ±0.1	9.6% ±<0.1
$200,000 or more	2,680 ±369	22.2% ±2.9	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 Dimas city by age, ACS 2020–2024
Age	Below poverty	Rate	California	United States
All ages	3,310 ±1,037	9.9% ±3.1	12.0% ±0.1	12.5% ±0.1
Under 18	939 ±444	13.9% ±6.3	15.0% ±0.1	16.1% ±0.1
18 to 59	1,683 ±480	9.4% ±2.6	11.0% ±0.1	11.6% ±0.1
60 and over	688 ±253	7.8% ±2.8	11.5% ±0.1	11.0% ±<0.1

Housing, 2020–2024

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Housing in San Dimas city, ACS 2020–2024
Measure	San Dimas city	California	United States
Housing units	12,370 ±483	14,644,735 ±1,665	143,775,355 ±10,234
Occupied	97.6% ±0.9	92.5% ±0.1	89.9% ±0.1
Vacant	0.9% to 3.9%	7.5% ±0.1	10.1% ±0.1
Owner occupied	72.4% ±3.1	55.9% ±0.3	65.2% ±0.3
Renter occupied	27.6% ±3.5	44.1% ±0.2	34.8% ±0.1
Median home value	$801,800 ±$25,052	$734,700 ±$1,307	$332,700 ±$236
Median gross rent	$2,278 ±$99	$2,036 ±$5	$1,413 ±$2
Median year built	1976 ±1	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 Dimas city by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	California	United States
Hispanic or Latino	13,828 ±1,071	40.9% ±3.2	40.2% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	11,389 ±1,002	33.7% ±3.0	33.8% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	1,152 ±456	3.4% ±1.3	5.2% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	5,514 ±1,146	16.3% ±3.4	15.3% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 9	0% to < 0.1%	0.3% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 233	0% to 0.7%	0.3% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	34 to 266	0.1% to 0.8%	0.6% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	1,658 ±541	4.9% ±1.6	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 Dimas city by place of birth and citizenship, ACS 2020–2024
Born	People	Share	California	United States
Born in the state	22,104 ±754	65.4% ±2.2	56.5% ±0.1	57.3% ±<0.1
Born in another state	4,030 ±604	11.9% ±1.8	15.0% ±0.1	26.9% ±<0.1
Born a citizen outside the states	391 ±153	1.2% ±0.5	1.5% ±<0.1	1.7% ±<0.1
Born abroad	7,264 ±786	21.5% ±2.3	27.0% ±0.1	14.1% ±<0.1
Naturalized citizens	5,364 ±703	15.9% ±2.1	14.7% ±0.1	7.4% ±<0.1
Not citizens	1,900 ±499	5.6% ±1.5	12.3% ±0.1	6.8% ±<0.1

San Dimas city among the places of California

244th 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 Dimas city in population, ACS 2020–2024
Place	ACS 2020–⁠2024
West Hollywood city	34,884 ±26
Oildale CDP	34,687 ±2,262
Pleasant Hill city	34,235 ±56
Manhattan Beach city	34,210 ±34
Westmont CDP	34,123 ±2,209
San Dimas city	33,789 ±81
Desert Hot Springs city	33,200 ±37
Fair Oaks CDP	32,799 ±1,611
Foster City city	32,792 ±53
Dana Point city	32,790 ±59
Los Gatos town	32,786 ±41

Elsewhere on the site

Reported crime in San Dimas city, California

Rankings this appears in

No. 49 Places in California by median age
No. 89 Places in California by homeownership rate
No. 97 Places in California by median rent
No. 115 Places in California by median household income
No. 119 Places in California by poverty rate
No. 169 Places in California by per capita 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