County record · fips 19013 · Iowa
Black HawkIA
Democratic ×10 since 1988all 40 elections, 1868–2024
The Long Record
40 elections against the Iowa and national vote
2024 result
D+1.2
won by Democrats
Record since first cycle
16–24
Dem–Rep two-party wins
Voted with the winner
29/40
73% of its elections
Closest election
1932
R+0.3
this countyIowanational (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 |
|---|---|---|
| 1912 | +66.6 pts | Democrats |
| 1916 | -62.1 pts | Republicans |
| 1920 | -39.3 pts | Republicans |
| 1932 | +39.0 pts | Democrats |
| 1952 | -34.6 pts | Republicans |
Who Lives Here
Census & ACS county profile, 2024
Population
131,049
College (BA+)
30%
Median income
$66,417
2024 dollars
Non-white
22%
Rural
13%
Age 65+
18%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Benton, IA · Bremer, IA · Buchanan, IA · Butler, IA · Grundy, IA · Tama, IA