Arapahoe County, Colorado

2024 results by precinct

393 precincts · 325,631 votes cast

Harris · D+20

Harris +50

Trump +50

Real precinct boundaries. Hover for vote totals.

38 presidential elections

Year	Won	Margin	Democratic	Republican	Total
2024	D	+20.1%	190,725	125,311	325,631
2020	D	+24.6%	213,673	127,356	350,283
2016	D	+14.1%	159,885	117,053	303,048
2012	D	+9.9%	153,905	125,588	285,516
2008	D	+12.9%	148,218	113,866	266,148
2004	R	−4.0%	110,262	119,475	232,365
2000	R	−8.0%	82,614	97,768	189,942
1996	R	−8.9%	68,306	82,778	162,996
1992	R	−3.1%	66,607	72,221	183,935
1988	R	−21.9%	61,113	95,926	159,245
1984	R	−45.2%	39,891	107,556	149,554
1980	R	−38.6%	30,148	79,594	127,980
1976	R	−29.6%	33,685	63,154	99,526
1972	R	−46.5%	18,631	52,283	72,376
1968	R	−26.8%	18,569	33,712	56,519
1964	D	+9.5%	27,940	23,071	51,358
1960	R	−20.4%	17,400	26,379	43,916
1956	R	−26.8%	11,351	19,716	31,243
1952	R	−21.8%	9,843	15,402	25,534
1948	D	+6.5%	7,943	6,962	15,080
1944	R	−9.5%	7,485	9,057	16,611
1940	R	−2.7%	7,571	7,988	15,696
1936	D	+19.8%	6,489	4,272	11,171
1932	D	+14.2%	5,796	4,287	10,642
1928	R	−41.8%	2,463	6,086	8,659
1924	R	−46.0%	1,209	4,267	6,643
1920	R	−24.0%	1,752	2,930	4,900
1916	D	+28.4%	2,652	1,443	4,255
1912	D	+16.2%	1,379	765	3,796
1908	R	−5.8%	1,340	1,514	2,998
1904	R	−29.5%	717	1,351	2,147
1900	D	+13.7%	33,754	25,469	60,483
1896	D	+74.2%	42,521	6,057	49,134
1892	R	−48.1%	0	11,331	23,553
1888	R	−15.8%	8,320	11,541	20,408
1884	R	−13.8%	5,310	7,133	13,168
1880	R	−8.0%	3,582	4,214	7,898
1876	—	No data	—	—	—

Demographics

Race, ethnicity, and ancestry

Click any group to see the ancestries typically reported within it.

American

100.0%

Polish

0.6%

African American

8.7%

Multiple ancestry combinations reported; no single grouping above 1%.

American Indian, Alaska Native, Native Hawaiian, and Pacific Islander combined.

Source · American Community Survey 5-year estimates, 2024 release. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.

Age distribution by sex

Median age: 37.3 in this county, 39.1 nationally

Male

Age

Female

0.5%

85+

1.0%

1.8%

75–84

2.3%

4.1%

65–74

4.8%

5.6%

55–64

5.8%

6.4%

45–54

6.3%

7.7%

35–44

7.4%

8.1%

25–34

7.6%

4.2%

18–24

4.0%

8.6%

5–17

8.2%

2.9%

2.8%

Source · American Community Survey 5-year estimates, 2024 release.

Median household income

2024 inflation-adjusted dollars

$101,087

Arapahoe County ranks in the top 5% of US counties.

Arapahoe County$101,087

Colorado$95,470

United States$80,734

Source · American Community Survey 5-year estimates, 2024 release.

Poverty rate

All persons below federal poverty line

8.6%

Children face moderate poverty.

Children under 1818.0%

Working age (18–64)100.0%

Seniors (65+)18.0%

Source · American Community Survey 5-year estimates, 2024 release.

Language at home

Population aged 5 and older

0.0%

speak English only

Source · ACS 5-year estimates, 2024.

Religious adherents

Adherents per capita by tradition

Catholic & Orthodox

14.4%

Other Christian

10.9%

Mainline Protestant

3.3%

Non-Christian

2.6%

Baptist

1.5%

Pentecostal & Holiness

1.3%

Methodist

0.7%

Source · 2020 US Religion Census. Remaining 65.3% of residents not counted as adherents by any reporting body.

Home to Aurora, Colorado's third-largest city, Arapahoe County has shifted from a reliably competitive suburb to one posting 20-point Democratic presidential margins, driven by rapid diversification and sustained population growth along the I-225 corridor.

The 2008 election was the turning point, when the Democratic candidate carried the county by thirteen points. The 2024 margin was twenty points, in line with the county's new direction.

The demographics suggest why. A population of 659,844, a 59% non-Hispanic-white share, and a median household income of $101,087 situate the county in the broader realignment patterns of recent cycles. The county's voting pattern over the last decade is most similar to that of Mono County and Jefferson County.

Most similar counties

Prince William County

Virginia

Similarity 0.97

Arapahoe County changed direction in the last decade.