HarrisDemocratic44.9%23,705TrumpRepublican53.5%28,224KennedyWe The People0.7%377
R+8.6- Lead
- 4,519
- Total
- 52,770
- vs nation
- R+7.1
- Turnout
- 70.9%
Akashiccounty
Dubuque County, IA
Contests in this Place (88 available)
President34 · 1892–2024 · 3 mapped
▦ precinct · ▥ counties · ▢ no spatial detail
President margin by year
Place winner margin
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
The precinct map shows the 2024 presidential vote; the timeline scrubs the county’s overall result across 1892–2024.
President results by year
2024 turnout 70.9% of 74,814 citizens 18+
BidenDemocratic47.6%25,657TrumpRepublican50.5%27,214JorgensenLibertarian1.0%556
R+2.9- Lead
- 1,557
- Total
- 53,926
- vs nation
- R+7.3
- Turnout
- 73.5%
ClintonDemocratic45.5%22,850TrumpRepublican46.7%23,460JohnsonLibertarian4.0%2,013
R+1.2- Lead
- 610
- Total
- 50,221
- vs nation
- R+3.3
- Turnout
- 68.8%
ObamaDemocratic56.5%28,768RomneyRepublican41.8%21,280JohnsonLibertarian0.9%438
D+14.7- Lead
- 7,488
- Total
- 50,894
- vs nation
- D+10.9
- Turnout
- —
ObamaDemocratic59.7%28,611McCainRepublican38.9%18,651OtherAll other candidates1.4%691
D+20.8- Lead
- 9,960
- Total
- 47,953
- vs nation
- D+13.5
- Turnout
- —
KerryDemocratic56.5%26,561BushRepublican42.7%20,100OtherAll other candidates0.8%382
D+13.7- Lead
- 6,461
- Total
- 47,043
- vs nation
- D+16.2
- Turnout
- —
GoreDemocratic55.4%22,341BushRepublican40.8%16,462NaderGreen2.4%987
D+14.6- Lead
- 5,879
- Total
- 40,323
- vs nation
- D+14.1
- Turnout
- —
ClintonDemocratic54.8%20,839DoleRepublican35.2%13,391PerotReform8.7%3,304
D+19.6- Lead
- 7,448
- Total
- 38,051
- vs nation
- D+11.1
- Turnout
- —
Key facts
- 2024 presidential margin
- R+8.6MIT Election Lab
- Population
- 99,0302024 5-year
- Population density
- 163 / sq mi2024 5-year · TIGER/Line
- Land area
- 608 sq miTIGER/Line
- Median household income
- $77,6302024 5-year
- White (non-Hispanic)
- 88.3%2024 5-year
- Black
- 2.9%2024 5-year
- Hispanic / Latino
- 3.3%2024 5-year
- Peak Democratic margin
- D+46.2 in 1932MIT Election Lab
- Peak Republican margin
- R+22.9 in 1920MIT Election Lab
- Most similar
- Erie County, OH · twin score 85.3
Turnout and midterm durability
Participation measured against the same-year citizen voting-age population. Audited cycles count total general-election participants — ballots or participating voters, not presidential candidate votes. Cycles before 2016 predate that series and are derived from the certified presidential returns instead; they are marked everywhere they appear and are excluded from the figures below.
2004–20248 cycles · 5 audited
- 2024 turnout
- 70.9%53,057 participants ÷ 74,814 CVAP
- 2020→2022 drop-off
- +21.2 ptsPresidential-dependent
- Drop-off vs state
- +0.2 ptsPositive means a larger decline than the statewide pattern
- Mechanical 2026
- 49.7%–55.3%Recent-cycle and two-cycle persistence scenarios; not a forecast
Participation by cycle
Presidential Midterm Derived, pre-2016
Select a presidential cycle to show it on the map and results ledger above.
| Cycle | Participants | CVAP | Turnout | Series | Quality |
|---|---|---|---|---|---|
| 53,057 | 74,814 ± 352 | 70.9% | Audited | A/A | |
| 2022Mid | 39,191 | 74,917 ± 371 | 52.3% | Audited | A/A |
| 54,185 | 73,720 ± 319 | 73.5% | Audited | A/A | |
| 2018Mid | 43,069 | 73,237 ± 349 | 58.8% | Audited | A/A |
| 50,221 | 73,008 ± 312 | 68.8% | Audited | A/A | |
| 50,894 | 70,773 | 71.9% | Derived | — | |
| 47,953 | 69,023 | 69.5% | Derived | — | |
| 47,043 | 67,273 extrapolated | 69.9% | Derived | — |
Sources and methods
Audited cycles (2016, 2018, 2020, 2022, 2024) count total general-election participants against the same-year CVAP special tabulation, each cell carrying its own numerator and denominator quality grade. Derived cycles (2004, 2008, 2012) come from the certified presidential returns on this page over the ACS 5-year CVAP series, so they measure presidential votes cast rather than ballots — a floor on participation. Where a derived cycle predates the ACS its denominator is extrapolated rather than read, and says so on its own line below. They are shown for the longer arc and are excluded from the drop-off, excess-drop-off, and 2026 scenario figures above.
- 2024: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 311/228.
- 2022: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 306/183.
- 2020: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 301/2.
- 2018: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 297/138.
- 2016: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 293/111.
- 2012 (derived): Certified presidential returns · ACS 5-year CVAP (B05003); presidential votes cast — a floor on participation, not a ballot count.
- 2008 (derived): Certified presidential returns · ACS 5-year CVAP (B05003); presidential votes cast — a floor on participation, not a ballot count.
- 2004 (derived): Certified presidential returns · extrapolated CVAP denominator; presidential votes cast — a floor on participation, not a ballot count; 2004 predates the ACS, so the denominator is a linear back-extrapolation from the 2008 and 2012 CVAP values, not a read figure.
Interactive election map
One map. Every available contest.
The map and local result cover Dubuque County only. The complete contest result is shown below for comparison.
Dubuque County result
0 precinct units · 0 candidate votes
Rob Sand0—
Write-in0—
Governor contest result
Loading the complete contest result…
Explore precinct resultsSearch, sort, compare years, or export CSV · 34 precincts
Precinct data
Results by precinct
34 precincts · 52,566 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -3232 | 954 | 1,394 | 28 | 2,376 | 40.2% | 58.7% | R+18.5 |
|---|---|---|---|---|---|---|---|
| Precinct -2222 | 912 | 1,265 | 21 | 2,198 | 41.5% | 57.6% | R+16.1 |
| Precinct -3333 | 781 | 1,391 | 23 | 2,195 | 35.6% | 63.4% | R+27.8 |
| Precinct -2323 | 750 | 1,320 | 24 | 2,094 | 35.8% | 63.0% | R+27.2 |
| Precinct -2121 | 1,101 | 963 | 22 | 2,086 | 52.8% | 46.2% | D+6.6 |
| Precinct -2020 | 1,138 | 880 | 26 | 2,044 | 55.7% | 43.1% | D+12.6 |
| Precinct -22 | 1,109 | 877 | 19 | 2,005 | 55.3% | 43.7% | D+11.6 |
| Precinct -3434 | 727 | 1,244 | 26 | 1,997 | 36.4% | 62.3% | R+25.9 |
| Precinct -55 | 950 | 1,020 | 21 | 1,991 | 47.7% | 51.2% | R+3.5 |
| Precinct -66 | 953 | 1,010 | 28 | 1,991 | 47.9% | 50.7% | R+2.9 |
| Precinct -2626 | 539 | 1,372 | 24 | 1,935 | 27.9% | 70.9% | R+43.0 |
| Precinct -44 | 889 | 921 | 17 | 1,827 | 48.7% | 50.4% | R+1.8 |
| Precinct -11 | 794 | 917 | 16 | 1,727 | 46.0% | 53.1% | R+7.1 |
| Precinct -3131 | 588 | 1,018 | 21 | 1,627 | 36.1% | 62.6% | R+26.4 |
| Precinct -1212 | 825 | 774 | 22 | 1,621 | 50.9% | 47.7% | D+3.1 |
| Precinct -2929 | 463 | 1,123 | 10 | 1,596 | 29.0% | 70.4% | R+41.4 |
| Precinct -77 | 820 | 750 | 15 | 1,585 | 51.7% | 47.3% | D+4.4 |
| Precinct -88 | 816 | 733 | 26 | 1,575 | 51.8% | 46.5% | D+5.3 |
| Precinct -1515 | 810 | 727 | 28 | 1,565 | 51.8% | 46.5% | D+5.3 |
| Precinct -33 | 806 | 655 | 14 | 1,475 | 54.6% | 44.4% | D+10.2 |
| Precinct -2424 | 452 | 990 | 23 | 1,465 | 30.9% | 67.6% | R+36.7 |
| Precinct -1919 | 771 | 583 | 15 | 1,369 | 56.3% | 42.6% | D+13.7 |
| Precinct -3030 | 527 | 807 | 12 | 1,346 | 39.2% | 60.0% | R+20.8 |
| Precinct -1111 | 635 | 680 | 21 | 1,336 | 47.5% | 50.9% | R+3.4 |
| Precinct -1010 | 675 | 632 | 14 | 1,321 | 51.1% | 47.8% | D+3.3 |
| Precinct -99 | 674 | 597 | 16 | 1,287 | 52.4% | 46.4% | D+6.0 |
| Precinct -1313 | 494 | 544 | 13 | 1,051 | 47.0% | 51.8% | R+4.8 |
| Precinct -1818 | 668 | 350 | 13 | 1,031 | 64.8% | 33.9% | D+30.8 |
| Precinct -1414 | 497 | 443 | 16 | 956 | 52.0% | 46.3% | D+5.6 |
| Precinct -2828 | 248 | 640 | 19 | 907 | 27.3% | 70.6% | R+43.2 |
| Precinct -2727 | 276 | 588 | 13 | 877 | 31.5% | 67.0% | R+35.6 |
| Precinct -1616 | 504 | 323 | 16 | 843 | 59.8% | 38.3% | D+21.5 |
| Precinct -1717 | 430 | 332 | 11 | 773 | 55.6% | 42.9% | D+12.7 |
| Precinct -2525 | 129 | 361 | 4 | 494 | 26.1% | 73.1% | R+47.0 |
presidential history
Party record book
Dubuque County, IA · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 · 34 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Franklin D. Roosevelt1932
71.2%
19,210 votes · D+46.2
Runner-up · Lyndon B. Johnson, 1964 · 70.1%
Republican
Warren G. Harding1920
59.2%
12,436 votes · R+22.9
Runner-up · Dwight D. Eisenhower, 1956 · 57.4%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Barack Obama2012
28,768votes
56.5% of the vote · D+14.7
Runner-up · Barack Obama, 2008 · 28,611 votes
Republican
Donald Trump2024
28,224votes
53.5% of the vote · R+8.6
Runner-up · Donald Trump, 2020 · 27,214 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
Al Smith1928
+50.6pts D vs U.S.
Place D+33.1 · U.S. R+17.5
Runner-up · Michael Dukakis, 1988 · +31.8 pts
Republican
Wendell Willkie1940
+12.7pts R vs U.S.
Place R+2.8 · U.S. D+9.9
Runner-up · Donald Trump, 2020 · +7.3 pts
current representation
Current officeholders
RMike KlimeshState Senate · 32
RCarrie KoelkerState Senate · 33
RDan ZumbachState Senate · 34
DTom TownsendState Senate · 36
RJason GearhartState House · 64
RShannon LundgrenState House · 65
RCraig JohnsonState House · 67
RJennifer SmithState House · 72
Seats representing Dubuque County, IA. A county elects none of these itself — they are the members for the 1 congressional, 4 state senate and 4 state house districts it falls inside, so parts of the county are represented by different members.
U.S. House elections · 3 House
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row shows U.S. House votes counted inside this Place. “Vote lead” is the local lead here, not necessarily the winner of the full contest.
voter registration
Registered voters
By party of registration, over time
Party registration · 2024D+3.7
Presidential vote · 2024R+8.6
Dubuque County, IA registers Democratic but votes Republican — a 12-point gap between how voters register and how they vote, the signature of ancestral registration that trails realignment.
DemocraticRepublicanUnaffiliatedOther parties
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2008 | 64,903 | 27,811 | 13,750 | 23,328 | 14 |
| 2010 | 63,916 | 26,907 | 14,323 | 22,656 | 30 |
| 2012 | 67,553 | 26,992 | 15,878 | 24,592 | 91 |
| 2014 | 68,093 | 26,875 | 16,162 | 24,865 | 191 |
| 2016 | 69,564 | 28,054 | 17,438 | 23,723 | 349 |
| 2018 | 69,850 | 27,665 | 17,179 | 24,451 | 555 |
| 2020 | 72,152 | 29,007 | 20,904 | 21,633 | 608 |
| 2022 | 71,290 | 27,207 | 21,001 | 22,425 | 657 |
| 2024 | 71,627 | 25,123 | 22,507 | 23,243 | 754 |
domestic migration
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
+177 net domestic migration · 2025
20112025
Net −747 over 2011–2025 · gain loss
Arrivals reported $59,508 in average income, against $96,729 for residents who stayed — 38% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+4.9 on average — 3.7 points more Democratic-leaning than Dubuque County, IA itself (R+8.6).
Where arrivals came from lean of each source
- Jo Daviess County, IL118R+16.8
- Grant County, WI108R+18.1
- Cook County, IL97D+41.6
- Linn County, IA90D+9.9
- Jackson County, IA89R+32.5
- Delaware County, IA68R+39.5
Where departures went households, 2022–23
- Linn County, IA98
- Jackson County, IA96
- Jo Daviess County, IL90
- Grant County, WI78
- Cook County, IL76
- Johnson County, IA69
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 | +265 |
| 2012 | +234 |
| 2013 | +433 |
| 2014 | +127 |
| 2015 | +21 |
| 2016 | −574 |
| 2017 | −48 |
| 2018 | −465 |
| 2019 | +106 |
| 2021 | −572 |
| 2022 | −273 |
| 2023 | −36 |
| 2024 | −142 |
| 2025 | +177 |
Dubuque County, long anchored by its Catholic, union-influenced workforce in Iowa's oldest city, has moved steadily toward Republican margins over the past decade — a shift that mirrors broader realignment among working-class voters in the Midwest.
Across the recorded series it reached a Democratic high of 46.2 points in 1932 and a Republican high of 22.9 points in 1920. Between 2020 and 2024 the county moved 5.7 points toward the Republican candidate; the 2024 margin was 8.6 points.
A population of 99,030, a 88% non-Hispanic-white share, and a median household income of $77,630 describe the county. The county's voting pattern over the last decade is most similar to that of Erie County and Grant County.
Political twins — counties
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Erie County
Ohio
85.3twin score
2000–2012 trajectory≠ % Catholic
Grant County
Wisconsin
83.9twin score
2004–2012 trajectory% Catholic≠ elasticity
Silver Bow County
Montana
82.5twin score
2000–2012 trajectory≠ elasticity
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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Dubuque County, Iowa. Akashic. https://akashic.app/county/19061/. Accessed May 20, 2026. License: CC BY 4.0.
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Cities & towns in Dubuque County
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Frequently asked questions
How did Dubuque County, Iowa vote in 2024?
In 2024, Dubuque County, Iowa voted Republican by 8.6 points (R+8.6), carried by the Republican candidate. Out of 52,770 votes cast, 23,705 went Democratic and 28,224 went Republican.
When did Dubuque County, Iowa last vote Democratic?
The most recent presidential election in which Dubuque County, Iowa voted Democratic was 2012.
How many people live in Dubuque County, Iowa?
Dubuque County, Iowa has a population of 99,030 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Dubuque County, Iowa?
Median household income in Dubuque County, Iowa is $77,630 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Dubuque County, Iowa?
Akashic tracks 38 presidential elections in Dubuque County, Iowa from 1876 to 2024. Of those, 25 went Democratic and 8 went Republican.