Black Hawk County, Iowa
Precinct data
Results by precinct
59 precincts · 62,653 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -Precinct W106Precinct W106 | 840 | 1,045 | 20 | 1,905 | 44.1% | 54.9% | R+10.8 |
|---|---|---|---|---|---|---|---|
| Precinct -Precinct X503Precinct X503 | 948 | 914 | 24 | 1,886 | 50.3% | 48.5% | D+1.8 |
| Precinct -Precinct X102Precinct X102 | 976 | 710 | 26 | 1,712 | 57.0% | 41.5% | D+15.5 |
| Precinct -Precinct X501Precinct X501 | 910 | 728 | 30 | 1,668 | 54.6% | 43.6% | D+10.9 |
| Precinct -HudsonHudson | 599 | 1,038 | 16 | 1,653 | 36.2% | 62.8% | R+26.6 |
| Precinct -Precinct X502Precinct X502 | 821 | 811 | 15 | 1,647 | 49.8% | 49.2% | D+0.6 |
| Precinct -Big Creek/Spring Creek/La PorteBig Creek/Spring Creek/La Porte | 539 | 1,080 | 26 | 1,645 | 32.8% | 65.7% | R+32.9 |
| Precinct -Cedar/Poyner 2/GilbertvilleCedar/Poyner 2/Gilbertville | 633 | 964 | 21 | 1,618 | 39.1% | 59.6% | R+20.5 |
| Precinct -Precinct X202Precinct X202 | 836 | 745 | 21 | 1,602 | 52.2% | 46.5% | D+5.7 |
| Precinct -Precinct X203Precinct X203 | 778 | 791 | 22 | 1,591 | 48.9% | 49.7% | R+0.8 |
| Precinct -Precinct X302Precinct X302 | 793 | 775 | 21 | 1,589 | 49.9% | 48.8% | D+1.1 |
| Precinct -Precinct X301Precinct X301 | 755 | 810 | 21 | 1,586 | 47.6% | 51.1% | R+3.5 |
| Precinct -Precinct X303Precinct X303 | 739 | 821 | 21 | 1,581 | 46.7% | 51.9% | R+5.2 |
| Precinct -Precinct W201Precinct W201 | 737 | 722 | 15 | 1,474 | 50.0% | 49.0% | D+1.0 |
| Precinct -Precinct X403Precinct X403 | 769 | 646 | 16 | 1,431 | 53.7% | 45.1% | D+8.6 |
| Precinct -Poy1/E.Wloo/Raymond/Fox/JesupPoy1/E.Wloo/Raymond/Fox/Jesup | 498 | 918 | 12 | 1,428 | 34.9% | 64.3% | R+29.4 |
| Precinct -Precinct X402Precinct X402 | 797 | 610 | 15 | 1,422 | 56.0% | 42.9% | D+13.2 |
| Precinct -Precinct W104Precinct W104 | 691 | 698 | 14 | 1,403 | 49.3% | 49.8% | R+0.5 |
| Precinct -Barc/Benn/Lester/DunkertonBarc/Benn/Lester/Dunkerton | 401 | 970 | 21 | 1,392 | 28.8% | 69.7% | R+40.9 |
| Precinct -Precinct X103Precinct X103 | 886 | 487 | 19 | 1,392 | 63.6% | 35.0% | D+28.7 |
| Precinct -Precinct W505Precinct W505 | 733 | 565 | 22 | 1,320 | 55.5% | 42.8% | D+12.7 |
| Precinct -Precinct X401Precinct X401 | 708 | 434 | 21 | 1,163 | 60.9% | 37.3% | D+23.6 |
| Precinct -Precinct W305Precinct W305 | 544 | 557 | 17 | 1,118 | 48.7% | 49.8% | R+1.2 |
| Precinct -Precinct W102Precinct W102 | 574 | 526 | 16 | 1,116 | 51.4% | 47.1% | D+4.3 |
| Precinct -Union/Washington/JanesvilleUnion/Washington/Janesville | 369 | 729 | 13 | 1,111 | 33.2% | 65.6% | R+32.4 |
| Precinct -Precinct W204Precinct W204 | 547 | 514 | 10 | 1,071 | 51.1% | 48.0% | D+3.1 |
| Precinct -Precinct W301Precinct W301 | 560 | 503 | 7 | 1,070 | 52.3% | 47.0% | D+5.3 |
| Precinct -Precinct W203Precinct W203 | 525 | 504 | 17 | 1,046 | 50.2% | 48.2% | D+2.0 |
| Precinct -Precinct X101Precinct X101 | 465 | 546 | 9 | 1,020 | 45.6% | 53.5% | R+7.9 |
| Precinct -Precinct W506Precinct W506 | 545 | 458 | 12 | 1,015 | 53.7% | 45.1% | D+8.6 |
| Precinct -Precinct W504Precinct W504 | 539 | 440 | 14 | 993 | 54.3% | 44.3% | D+10.0 |
| Precinct -Precinct W205Precinct W205 | 461 | 511 | 8 | 980 | 47.0% | 52.1% | R+5.1 |
| Precinct -Precinct W502Precinct W502 | 504 | 411 | 10 | 925 | 54.5% | 44.4% | D+10.1 |
| Precinct -Precinct W202Precinct W202 | 457 | 391 | 11 | 859 | 53.2% | 45.5% | D+7.7 |
| Precinct -Precinct W103Precinct W103 | 488 | 307 | 15 | 810 | 60.2% | 37.9% | D+22.3 |
| Precinct -Precinct W401Precinct W401 | 604 | 187 | 8 | 799 | 75.6% | 23.4% | D+52.2 |
| Precinct -Precinct W406Precinct W406 | 415 | 360 | 9 | 784 | 52.9% | 45.9% | D+7.0 |
| Precinct -Precinct W206Precinct W206 | 345 | 431 | 5 | 781 | 44.2% | 55.2% | R+11.0 |
| Precinct -Precinct W303Precinct W303 | 501 | 267 | 11 | 779 | 64.3% | 34.3% | D+30.0 |
| Precinct -Precinct W105Precinct W105 | 406 | 366 | 6 | 778 | 52.2% | 47.0% | D+5.1 |
| Precinct -Precinct W101Precinct W101 | 363 | 369 | 9 | 741 | 49.0% | 49.8% | R+0.8 |
| Precinct -Precinct X201Precinct X201 | 495 | 233 | 13 | 741 | 66.8% | 31.4% | D+35.4 |
| Precinct -Precinct W503Precinct W503 | 433 | 297 | 7 | 737 | 58.8% | 40.3% | D+18.5 |
| Precinct -Precinct W302Precinct W302 | 418 | 295 | 11 | 724 | 57.7% | 40.7% | D+17.0 |
| Precinct -Precinct W404Precinct W404 | 371 | 324 | 8 | 703 | 52.8% | 46.1% | D+6.7 |
| Precinct -Precinct W304Precinct W304 | 431 | 206 | 7 | 644 | 66.9% | 32.0% | D+34.9 |
| Precinct -Black Hawk/Cedar Falls/LincolnBlack Hawk/Cedar Falls/Lincoln | 211 | 425 | 5 | 641 | 32.9% | 66.3% | R+33.4 |
| Precinct -Elk Run HeightsElk Run Heights | 263 | 375 | 3 | 641 | 41.0% | 58.5% | R+17.5 |
| Precinct -Mt VernonMt Vernon | 224 | 399 | 7 | 630 | 35.6% | 63.3% | R+27.8 |
| Precinct -Precinct W402Precinct W402 | 458 | 140 | 13 | 611 | 75.0% | 22.9% | D+52.0 |
| Precinct -Precinct W306Precinct W306 | 355 | 204 | 15 | 574 | 61.8% | 35.5% | D+26.3 |
| Precinct -Evansdale Ward 3Evansdale Ward 3 | 233 | 332 | 6 | 571 | 40.8% | 58.1% | R+17.3 |
| Precinct -Evansdale Ward 4Evansdale Ward 4 | 209 | 345 | 4 | 558 | 37.5% | 61.8% | R+24.4 |
| Precinct -Evansdale Ward 1Evansdale Ward 1 | 231 | 312 | 9 | 552 | 41.8% | 56.5% | R+14.7 |
| Precinct -Eagle/OrangeEagle/Orange | 154 | 389 | 7 | 550 | 28.0% | 70.7% | R+42.7 |
| Precinct -Evansdale Ward 2Evansdale Ward 2 | 227 | 306 | 5 | 538 | 42.2% | 56.9% | R+14.7 |
| Precinct -Precinct W403Precinct W403 | 450 | 58 | 6 | 514 | 87.5% | 11.3% | D+76.3 |
| Precinct -Precinct W405Precinct W405 | 316 | 141 | 5 | 462 | 68.4% | 30.5% | D+37.9 |
| Precinct -Precinct W501Precinct W501 | 221 | 132 | 5 | 358 | 61.7% | 36.9% | D+24.9 |
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | −15.4% |
| 1896 | −35.2% |
| 1900 | −32.1% |
| 1904 | −43.1% |
| 1908 | −25.4% |
| 1912 | +19.7% |
| 1916 | −21.8% |
| 1920 | −58.5% |
| 1924 | −53.0% |
| 1928 | −39.1% |
| 1932 | −0.3% |
| 1936 | +9.9% |
| 1940 | +0.5% |
| 1944 | +2.8% |
| 1948 | +9.8% |
| 1952 | −24.5% |
| 1956 | −16.1% |
| 1960 | −8.3% |
| 1964 | +21.7% |
| 1968 | −9.1% |
| 1972 | −17.1% |
| 1976 | −2.4% |
| 1980 | −3.4% |
| 1984 | −1.2% |
| 1988 | +13.4% |
| 1992 | +13.3% |
| 1996 | +19.4% |
| 2000 | +12.1% |
| 2004 | +11.5% |
| 2008 | +22.4% |
| 2012 | +20.2% |
| 2016 | +7.3% |
| 2020 | +9.0% |
| 2024 | +1.2% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | D | 51.0%24,036 | 49.0%23,133 | 47,169 |
| 2020 | D | 53.0%34,963 | 44.3%29,222 | 65,976 |
Registered voters
By party of registration, over time
Registration leans Democratic; the presidential vote runs 7.5 points more Democratic.
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2008 | 86,854 | 32,177 | 21,150 | 33,472 | 55 |
| 2010 | 88,180 | 32,216 | 21,957 | 33,899 | 108 |
| 2012 | 90,672 | 32,285 | 22,535 | 35,698 | 154 |
| 2014 | 89,734 | 31,817 | 21,968 | 35,613 | 336 |
| 2016 | 89,254 | 32,745 | 23,130 | 32,765 | 614 |
| 2018 | 89,217 | 32,562 | 22,506 | 33,251 | 898 |
| 2020 | 90,023 | 35,800 | 24,211 | 29,203 | 809 |
| 2022 | 87,360 | 33,374 | 23,344 | 29,836 | 806 |
| 2024 | 86,704 | 31,319 | 23,841 | 30,630 | 914 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
−526 net domestic migration · 2025
Net −9,561 over 2011–2025 · gain loss
Arrivals reported $48,443 in average income, against $81,946 for residents who stayed — 41% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+13.8 on average — 15 points more Republican-leaning than Black Hawk County, IA itself (D+1.2).
Where arrivals came from lean of each source
- Bremer County, IA200R+22.1
- Linn County, IA143D+9.9
- Polk County, IA127D+10.8
- Buchanan County, IA123R+28.1
- Grundy County, IA113R+41.7
- Butler County, IA87R+45.2
Where departures went households, 2022–23
- Polk County, IA244
- Bremer County, IA208
- Linn County, IA176
- Buchanan County, IA99
- Grundy County, IA91
- Johnson County, IA80
Migration is one input to a place’s political change, not its cause — a shift can also come from residents changing their minds, generational turnover, or turnout. These figures describe the places people moved between; they do not measure how any mover voted.
| Year | Net domestic migration |
|---|---|
| 2011 | −351 |
| 2012 | −348 |
| 2013 | +166 |
| 2014 | −451 |
| 2015 | −587 |
| 2016 | −1,499 |
| 2017 | −1,548 |
| 2018 | −1,190 |
| 2019 | −1,129 |
| 2021 | −830 |
| 2022 | −1,115 |
| 2023 | −9 |
| 2024 | −144 |
| 2025 | −526 |
Home to Waterloo and the University of Northern Iowa, Black Hawk County sits at the intersection of a mid-size industrial city and a college town — a combination that has kept its presidential margins razor-thin in recent cycles.
Across the recorded series it reached a Democratic high of 22.4 points in 2008 and a Republican high of 58.5 points in 1920. Between 2020 and 2024 the county moved 7.9 points toward the Republican candidate; the 2024 margin was 1.2 points.
A population of 131,049, a 78% non-Hispanic-white share, and a median household income of $66,417 describe the county. The county's voting pattern over the last decade is most similar to that of Linn County and Rock County.
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
Browse places by community — income, education, race & ethnicity, language — all community cuts →
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Black Hawk County, Iowa. Akashic. https://akashic.app/county/19013/. Accessed May 20, 2026. License: CC BY 4.0.