Demographics of Arapahoe County, Colorado

Arapahoe County, Colorado had 673,820 people on July 1, 2025, by the Census Bureau’s estimate: +18,551 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Arapahoe County, in four figures

673,820
Population: July 1, 2025, Vintage 2025 estimate.; +2.8%
Change since July 2020: +18,551 people.; 37.3 ±0.2
Median age: ACS 2020–⁠2024.; $101,087 ±$1,532
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Arapahoe County, Colorado's population grew 2.8% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Arapahoe County, Colorado'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

Arapahoe County, Colorado's population grew 2.8% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Arapahoe County, Colorado'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	655,269	100.0	100.0
2021	657,020	100.3	100.2
2022	659,472	100.6	100.7
2023	665,778	101.6	101.6
2024	675,760	103.1	102.5
2025	673,820	102.8	103.1

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Population of Arapahoe County, Colorado on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	655,269	+184	+413	+87	−538
2021	657,020	+1,751	+2,894	+970	−2,600
2022	659,472	+2,452	+2,652	+5,746	−5,690
2023	665,778	+6,306	+2,969	+9,801	−6,490
2024	675,760	+9,982	+2,982	+13,716	−6,781
2025	673,820	−1,940	+3,332	+4,621	−9,859

Age, 2020–2024

The median age is 37.3 ±0.2: for men 36.4 ±0.2 and for women 38.3 ±0.3. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Arapahoe County by age, ACS 2020–2024
Age	People	Share	Colorado	United States
Under 5	37,890 ±104	5.7% ±<0.1	5.3% ±<0.1	5.6% ±<0.1
5 to 17	111,172 ±1,746	16.8% ±0.3	15.7% ±0.1	16.3% ±<0.1
18 to 24	53,864 ±1,270	8.2% ±0.2	9.1% ±0.1	9.1% ±<0.1
25 to 44	202,409 ±1,779	30.7% ±0.3	30.3% ±0.1	26.9% ±<0.1
45 to 64	159,376 ±1,702	24.2% ±0.3	23.9% ±0.1	24.8% ±<0.1
65 and over	95,133 ±1,862	14.4% ±0.3	15.6% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $101,087 ±$1,532, and income per person $53,774 ±$743, in 2024 dollars. The median is $95,470 ±$578 in Colorado and $80,734 ±$166 in the United States.

Households by income

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Households in Arapahoe County by income, ACS 2020–2024
Household income	Households	Share	Colorado	United States
Under $25,000	23,579 ±1,301	9.2% ±0.5	11.2% ±0.2	14.6% ±<0.1
$25,000 to $49,999	32,034 ±1,552	12.5% ±0.6	13.6% ±0.2	16.7% ±<0.1
$50,000 to $74,999	37,374 ±1,519	14.5% ±0.6	14.6% ±0.2	15.5% ±<0.1
$75,000 to $99,999	34,295 ±1,585	13.3% ±0.6	12.8% ±0.2	12.6% ±<0.1
$100,000 to $149,999	50,648 ±1,731	19.7% ±0.7	19.2% ±0.2	17.5% ±<0.1
$150,000 to $199,999	32,158 ±1,254	12.5% ±0.5	11.7% ±0.2	9.6% ±<0.1
$200,000 or more	47,144 ±1,395	18.3% ±0.5	17.0% ±0.2	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 Arapahoe County by age, ACS 2020–2024
Age	Below poverty	Rate	Colorado	United States
All ages	56,488 ±3,597	8.6% ±0.5	9.4% ±0.2	12.5% ±0.1
Under 18	17,564 ±1,409	11.9% ±0.9	11.1% ±0.3	16.1% ±0.1
18 to 59	29,284 ±1,958	7.8% ±0.5	9.1% ±0.2	11.6% ±0.1
60 and over	9,640 ±898	7.3% ±0.7	8.7% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in Arapahoe County, ACS 2020–2024
Measure	Arapahoe County	Colorado	United States
Housing units	269,345 ±175	2,589,053 ±653	143,775,355 ±10,234
Occupied	95.5% ±0.4	91.7% ±0.2	89.9% ±0.1
Vacant	4.5% ±0.4	8.3% ±0.2	10.1% ±0.1
Owner occupied	64.7% ±0.8	66.2% ±0.3	65.2% ±0.3
Renter occupied	35.3% ±0.7	33.8% ±0.3	34.8% ±0.1
Median home value	$561,200 ±$5,168	$539,400 ±$2,069	$332,700 ±$236
Median gross rent	$1,891 ±$21	$1,761 ±$7	$1,413 ±$2
Median year built	1986 ±2	1988 ±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 Arapahoe County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Colorado	United States
Hispanic or Latino	143,439 ±0	21.7% ±<0.1	22.5% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	364,028 ±1,092	55.2% ±0.2	64.8% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	69,137 ±1,714	10.5% ±0.3	3.8% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	39,886 ±1,093	6.0% ±0.2	3.2% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	1,688 ±327	0.3% ±<0.1	0.4% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	1,719 ±169	0.3% ±<0.1	0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	3,614 ±755	0.5% ±0.1	0.5% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	36,333 ±2,181	5.5% ±0.3	4.6% ±0.1	4.3% ±<0.1

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 Arapahoe County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Colorado	United States
Born in the state	260,102 ±3,305	39.4% ±0.5	41.2% ±0.2	57.3% ±<0.1
Born in another state	278,733 ±3,295	42.2% ±0.5	47.2% ±0.2	26.9% ±<0.1
Born a citizen outside the states	11,854 ±836	1.8% ±0.1	1.7% ±0.1	1.7% ±<0.1
Born abroad	109,155 ±3,139	16.5% ±0.5	9.8% ±0.1	14.1% ±<0.1
Naturalized citizens	53,936 ±2,043	8.2% ±0.3	4.7% ±0.1	7.4% ±<0.1
Not citizens	55,219 ±2,342	8.4% ±0.4	5.2% ±0.1	6.8% ±<0.1

Arapahoe County among the counties of Colorado

3rd of 64 by population, July 2025. Every one is listed on the Colorado page.

Counties of Colorado near Arapahoe County in population, July 2025
County	July 2025	Change since 2020
El Paso County	757,040	+3.2%
Denver County	740,613	+3.2%
Arapahoe County	673,820	+2.8%
Jefferson County	580,451	−0.5%
Adams County	554,668	+6.6%
Douglas County	399,396	+10.8%
Weld County	378,426	+14.2%
Larimer County	377,292	+4.8%

Elsewhere on the site

Rankings this appears in

No. 3 Counties by population in Colorado
No. 28 Counties by population growth in Colorado

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — 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 — counties and Puerto Rico municipios, with components of change 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