County record · fips 08005 · Colorado
ArapahoeCO
Democratic ×5 since 2008reported 1880–2024 · 37 elections
The Long Record
37 elections against the Colorado and national vote
2024 result
D+20.7
won by Democrats
Record since first cycle
13–24
Dem–Rep two-party wins
Voted with the winner
25/37
68% of its elections
Closest election
1940
R+2.5
this countyColoradonational (official)dot colour = two-party winner · hollow = tie or unknown total · click a dot to open that election
The Biggest Swings
Cycle-over-cycle change in the two-party margin, in points
| Election | Swing | Toward |
|---|---|---|
| 1896 | +175.0 pts | Democrats |
| 1892 | -83.7 pts | Republicans |
| 1900 | -61.1 pts | Republicans |
| 1932 | +56.9 pts | Democrats |
| 1920 | -53.0 pts | Republicans |
Who Lives Here
Census & ACS county profile, 2024
Population
659,844
College (BA+)
47%
Median income
$101,087
2024 dollars
Non-white
45%
Rural
2%
Age 65+
14%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Adams, CO · Denver, CO · Douglas, CO · Elbert, CO · Jefferson, CO · Lincoln, CO · Washington, CO