Demographics of Simi Valley city, California

Simi Valley city, California had 124,861 people on July 1, 2025, by the Census Bureau’s estimate: −1,487 since July 2020. Age, income, poverty, housing and origin below come from the survey, averaged over 2020–2024, each with its margin of error.

Simi Valley city, in four figures

124,861
Population: July 1, 2025, Vintage 2025 estimate. The survey’s 2020–⁠2024 figure is 125,634 ±100.; −1.2%
Change since July 2020: −1,487 people.; 41.9 ±0.7
Median age: ACS 2020–⁠2024.; $122,081 ±$4,649
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.

Simi Valley city, California's population shrank 1.2% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Simi 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

Simi Valley city, California's population shrank 1.2% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Simi 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	126,348	100.0	100.0
2021	125,834	99.6	100.2
2022	125,055	99.0	100.7
2023	125,123	99.0	101.6
2024	125,349	99.2	102.5
2025	124,861	98.8	103.1

Population of Simi Valley city, California on July 1 of each year, Vintage 2025
July 1	Population	Change
2020	126,348	—
2021	125,834	−514
2022	125,055	−779
2023	125,123	+68
2024	125,349	+226
2025	124,861	−488

Age, 2020–2024

The median age is 41.9 ±0.7: for men 41.0 ±0.8 and for women 43.0 ±1.0. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Simi Valley city by age, ACS 2020–2024
Age	People	Share	California	United States
Under 5	5,654 ±588	4.5% ±0.5	5.5% ±<0.1	5.6% ±<0.1
5 to 17	18,825 ±1,066	15.0% ±0.8	16.5% ±<0.1	16.3% ±<0.1
18 to 24	11,165 ±860	8.9% ±0.7	9.1% ±<0.1	9.1% ±<0.1
25 to 44	31,978 ±1,331	25.5% ±1.1	28.7% ±<0.1	26.9% ±<0.1
45 to 64	36,423 ±1,388	29.0% ±1.1	24.6% ±<0.1	24.8% ±<0.1
65 and over	21,589 ±1,148	17.2% ±0.9	15.7% ±<0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $122,081 ±$4,649, and income per person $55,252 ±$1,763, 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 Simi Valley city by income, ACS 2020–2024
Household income	Households	Share	California	United States
Under $25,000	3,178 ±440	7.1% ±1.0	12.5% ±0.1	14.6% ±<0.1
$25,000 to $49,999	5,158 ±659	11.6% ±1.5	13.3% ±0.1	16.7% ±<0.1
$50,000 to $74,999	4,773 ±533	10.7% ±1.2	13.0% ±0.1	15.5% ±<0.1
$75,000 to $99,999	4,904 ±648	11.0% ±1.4	11.6% ±0.1	12.6% ±<0.1
$100,000 to $149,999	8,991 ±779	20.2% ±1.7	17.8% ±0.1	17.5% ±<0.1
$150,000 to $199,999	6,262 ±540	14.1% ±1.2	11.3% ±0.1	9.6% ±<0.1
$200,000 or more	11,191 ±667	25.2% ±1.4	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 Simi Valley city by age, ACS 2020–2024
Age	Below poverty	Rate	California	United States
All ages	7,970 ±972	6.4% ±0.8	12.0% ±0.1	12.5% ±0.1
Under 18	1,487 ±382	6.1% ±1.5	15.0% ±0.1	16.1% ±0.1
18 to 59	4,228 ±562	6.0% ±0.8	11.0% ±0.1	11.6% ±0.1
60 and over	2,255 ±357	7.4% ±1.1	11.5% ±0.1	11.0% ±<0.1

Housing, 2020–2024

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Housing in Simi Valley city, ACS 2020–2024
Measure	Simi Valley city	California	United States
Housing units	45,290 ±792	14,644,735 ±1,665	143,775,355 ±10,234
Occupied	98.2% ±0.4	92.5% ±0.1	89.9% ±0.1
Vacant	1.8% ±0.5	7.5% ±0.1	10.1% ±0.1
Owner occupied	72.9% ±1.4	55.9% ±0.3	65.2% ±0.3
Renter occupied	27.1% ±1.5	44.1% ±0.2	34.8% ±0.1
Median home value	$823,800 ±$10,216	$734,700 ±$1,307	$332,700 ±$236
Median gross rent	$2,579 ±$87	$2,036 ±$5	$1,413 ±$2
Median year built	1980 ±1	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 Simi Valley city by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	California	United States
Hispanic or Latino	36,438 ±1,565	29.0% ±1.2	40.2% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	66,988 ±1,617	53.3% ±1.3	33.8% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	1,556 ±430	1.2% ±0.3	5.2% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	12,888 ±1,000	10.3% ±0.8	15.3% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	75 to 253	0.1% to 0.2%	0.3% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	88 to 294	0.1% to 0.2%	0.3% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	817 ±250	0.7% ±0.2	0.6% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	6,592 ±871	5.2% ±0.7	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 Simi Valley city by place of birth and citizenship, ACS 2020–2024
Born	People	Share	California	United States
Born in the state	81,206 ±1,620	64.6% ±1.3	56.5% ±0.1	57.3% ±<0.1
Born in another state	19,687 ±1,072	15.7% ±0.9	15.0% ±0.1	26.9% ±<0.1
Born a citizen outside the states	1,558 ±324	1.2% ±0.3	1.5% ±<0.1	1.7% ±<0.1
Born abroad	23,183 ±1,408	18.5% ±1.1	27.0% ±0.1	14.1% ±<0.1
Naturalized citizens	15,143 ±1,012	12.1% ±0.8	14.7% ±0.1	7.4% ±<0.1
Not citizens	8,040 ±1,095	6.4% ±0.9	12.3% ±0.1	6.8% ±<0.1

Simi Valley city among the places of California

46th 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 Simi Valley city in population, ACS 2020–2024
Place	ACS 2020–⁠2024
Fullerton city	140,968 ±79
Orange city	138,266 ±77
Victorville city	137,627 ±74
Pasadena city	136,969 ±105
Santa Clara city	130,256 ±69
Simi Valley city	125,634 ±100
Thousand Oaks city	125,205 ±97
Clovis city	124,725 ±114
Vallejo city	124,268 ±96
Concord city	124,035 ±92
Fairfield city	120,785 ±65

Elsewhere on the site

Reported crime in Simi Valley 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

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