Demographics of Montclair city, California

Montclair city, California had 37,563 people on July 1, 2025, by the Census Bureau’s estimate: −372 since July 2020. Age, income, poverty, housing and origin below come from the survey, averaged over 2020–2024, each with its margin of error.

Montclair city, in four figures

37,563
Population: July 1, 2025, Vintage 2025 estimate. The survey’s 2020–⁠2024 figure is 37,810 ±61.; −1.0%
Change since July 2020: −372 people.; 33.7 ±1.7
Median age: ACS 2020–⁠2024.; $77,659 ±$9,408
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.

Montclair city, California's population shrank 1.0% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Montclair 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

Montclair city, California's population shrank 1.0% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Montclair 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	37,935	100.0	100.0
2021	37,953	100.0	100.2
2022	37,808	99.7	100.7
2023	37,754	99.5	101.6
2024	37,747	99.5	102.5
2025	37,563	99.0	103.1

Population of Montclair city, California on July 1 of each year, Vintage 2025
July 1	Population	Change
2020	37,935	—
2021	37,953	+18
2022	37,808	−145
2023	37,754	−54
2024	37,747	−7
2025	37,563	−184

Age, 2020–2024

The median age is 33.7 ±1.7: for men 32.3 ±2.2 and for women 35.3 ±2.2. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Montclair city by age, ACS 2020–2024
Age	People	Share	California	United States
Under 5	2,345 ±527	6.2% ±1.4	5.5% ±<0.1	5.6% ±<0.1
5 to 17	6,534 ±708	17.3% ±1.9	16.5% ±<0.1	16.3% ±<0.1
18 to 24	4,495 ±653	11.9% ±1.7	9.1% ±<0.1	9.1% ±<0.1
25 to 44	11,191 ±841	29.6% ±2.2	28.7% ±<0.1	26.9% ±<0.1
45 to 64	8,676 ±694	22.9% ±1.8	24.6% ±<0.1	24.8% ±<0.1
65 and over	4,569 ±459	12.1% ±1.2	15.7% ±<0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $77,659 ±$9,408, and income per person $27,549 ±$2,044, 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 Montclair city by income, ACS 2020–2024
Household income	Households	Share	California	United States
Under $25,000	1,536 ±314	14.4% ±2.9	12.5% ±0.1	14.6% ±<0.1
$25,000 to $49,999	2,062 ±416	19.4% ±3.8	13.3% ±0.1	16.7% ±<0.1
$50,000 to $74,999	1,615 ±310	15.2% ±2.8	13.0% ±0.1	15.5% ±<0.1
$75,000 to $99,999	1,293 ±273	12.1% ±2.5	11.6% ±0.1	12.6% ±<0.1
$100,000 to $149,999	1,939 ±284	18.2% ±2.5	17.8% ±0.1	17.5% ±<0.1
$150,000 to $199,999	1,486 ±293	14.0% ±2.7	11.3% ±0.1	9.6% ±<0.1
$200,000 or more	721 ±183	6.8% ±1.7	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 Montclair city by age, ACS 2020–2024
Age	Below poverty	Rate	California	United States
All ages	6,635 ±1,624	17.7% ±4.3	12.0% ±0.1	12.5% ±0.1
Under 18	2,145 ±549	24.4% ±5.7	15.0% ±0.1	16.1% ±0.1
18 to 59	3,393 ±814	15.1% ±3.5	11.0% ±0.1	11.6% ±0.1
60 and over	1,097 ±308	17.4% ±4.6	11.5% ±0.1	11.0% ±<0.1

Housing, 2020–2024

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Housing in Montclair city, ACS 2020–2024
Measure	Montclair city	California	United States
Housing units	10,974 ±524	14,644,735 ±1,665	143,775,355 ±10,234
Occupied	97.1% ±6.4	92.5% ±0.1	89.9% ±0.1
Vacant	2.9% ±1.4	7.5% ±0.1	10.1% ±0.1
Owner occupied	54.8% ±3.4	55.9% ±0.3	65.2% ±0.3
Renter occupied	45.2% ±2.8	44.1% ±0.2	34.8% ±0.1
Median home value	$569,100 ±$13,552	$734,700 ±$1,307	$332,700 ±$236
Median gross rent	$1,889 ±$111	$2,036 ±$5	$1,413 ±$2
Median year built	1969 ±2	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 Montclair city by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	California	United States
Hispanic or Latino	27,411 ±1,269	72.5% ±3.4	40.2% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	3,669 ±544	9.7% ±1.4	33.8% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	2,244 ±1,039	5.9% ±2.7	5.2% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	3,812 ±763	10.1% ±2.0	15.3% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 48	0% to 0.1%	0.3% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 89	0% to 0.2%	0.3% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	27 to 253	0.1% to 0.7%	0.6% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	479 ±184	1.3% ±0.5	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 Montclair city by place of birth and citizenship, ACS 2020–2024
Born	People	Share	California	United States
Born in the state	23,540 ±1,185	62.3% ±3.1	56.5% ±0.1	57.3% ±<0.1
Born in another state	2,279 ±410	6.0% ±1.1	15.0% ±0.1	26.9% ±<0.1
Born a citizen outside the states	328 ±144	0.9% ±0.4	1.5% ±<0.1	1.7% ±<0.1
Born abroad	11,663 ±1,105	30.8% ±2.9	27.0% ±0.1	14.1% ±<0.1
Naturalized citizens	6,605 ±763	17.5% ±2.0	14.7% ±0.1	7.4% ±<0.1
Not citizens	5,058 ±747	13.4% ±2.0	12.3% ±0.1	6.8% ±<0.1

Montclair city among the places of California

225th 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 Montclair city in population, ACS 2020–2024
Place	ACS 2020–⁠2024
La Quinta city	38,707 ±58
Calexico city	38,585 ±22
San Gabriel city	38,392 ±84
Bell Gardens city	38,229 ±40
Adelanto city	37,964 ±46
Montclair city	37,810 ±61
Monrovia city	37,571 ±63
Wildomar city	37,277 ±75
Pacifica city	37,261 ±56
La Puente city	37,142 ±60
Martinez city	36,903 ±41

Elsewhere on the site

Reported crime in Montclair city, California

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