HarrisDemocratic67.9%58,846TrumpRepublican30.1%26,087KennedyWe The People0.6%484
D+37.8- Lead
- 32,759
- Total
- 86,644
- vs nation
- D+39.3
- Turnout
- 73.2%
Akashiccounty
Johnson County, IA
Office (updates table and map)
President margin by year
Place winner margin
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
President results by year
2024 turnout 73.2% of 118,940 citizens 18+
BidenDemocratic70.6%59,177TrumpRepublican27.3%22,925JorgensenLibertarian1.1%964
D+43.2- Lead
- 36,252
- Total
- 83,851
- vs nation
- D+38.8
- Turnout
- 76.4%
ClintonDemocratic64.8%50,200TrumpRepublican27.2%21,044JohnsonLibertarian3.6%2,758
D+37.6- Lead
- 29,156
- Total
- 77,476
- vs nation
- D+35.5
- Turnout
- 74.3%
ObamaDemocratic66.7%50,666RomneyRepublican31.2%23,698JohnsonLibertarian1.1%846
D+35.5- Lead
- 26,968
- Total
- 75,977
- vs nation
- D+31.6
- Turnout
- —
ObamaDemocratic69.9%51,027McCainRepublican28.4%20,732OtherAll other candidates1.7%1,216
D+41.5- Lead
- 30,295
- Total
- 72,975
- vs nation
- D+34.2
- Turnout
- —
KerryDemocratic64.0%41,847BushRepublican34.7%22,715OtherAll other candidates1.2%811
D+29.3- Lead
- 19,132
- Total
- 65,373
- vs nation
- D+31.7
- Turnout
- —
GoreDemocratic59.1%31,174BushRepublican33.9%17,899NaderGreen6.2%3,248
D+25.2- Lead
- 13,275
- Total
- 52,769
- vs nation
- D+24.6
- Turnout
- —
ClintonDemocratic61.0%27,888DoleRepublican29.3%13,402PerotReform5.1%2,313
D+31.7- Lead
- 14,486
- Total
- 45,732
- vs nation
- D+23.2
- Turnout
- —
Key facts
- 2024 presidential margin
- D+37.8MIT Election Lab
- Population
- 156,6392024 5-year
- Median household income
- $74,9352024 5-year
- White (non-Hispanic)
- 74.8%2024 5-year
- Black
- 7.6%2024 5-year
- Hispanic / Latino
- 6.7%2024 5-year
- Peak Democratic margin
- D+43.2 in 2020MIT Election Lab
- Peak Republican margin
- R+16.4 in 1952MIT Election Lab
- Most similar
- Dane County, WI · twin score 96.4
Midterm durability
Total general-election participants divided by same-year citizen voting-age population. These are total ballots or participating voters—not presidential candidate votes.
- 2024 total turnout
- 73.2%87,107 participants ÷ 118,940 CVAP
- 2020→2022 drop-off
- +20.1 ptsPresidential-dependent
- Drop-off versus state
- -0.9 ptsPositive means a larger decline than the statewide pattern
- Mechanical 2026 scenario
- 53.2%–58.0%Recent-cycle and two-cycle persistence scenarios; not a forecast
| Election | Participants | CVAP | Turnout | Quality |
|---|---|---|---|---|
| 2016 · Presidential | 77,476 | 104,297 | 74.3% | A/A |
| 2018 · Midterm | 68,262 | 107,000 | 63.8% | A/A |
| 2020 · Presidential | 84,198 | 110,137 | 76.4% | A/A |
| 2022 · Midterm | 64,011 | 113,509 | 56.4% | A/A |
| 2024 · Presidential | 87,107 | 118,940 | 73.2% | A/A |
Sources and methods
- 2016: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 293/111.
- 2018: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 297/138.
- 2020: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 301/2.
- 2022: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 306/183.
- 2024: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 311/228.
Precinct data
Results by precinct
65 precincts · 86,068 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -CV.06CV.06 | 1,539 | 569 | 22 | 2,130 | 72.3% | 26.7% | D+45.5 |
|---|---|---|---|---|---|---|---|
| Precinct -IC.17IC.17 | 1,683 | 250 | 29 | 1,962 | 85.8% | 12.7% | D+73.0 |
| Precinct -CV.02CV.02 | 1,346 | 568 | 25 | 1,939 | 69.4% | 29.3% | D+40.1 |
| Precinct -IC.16/SC.90IC.16/SC.90 | 1,497 | 410 | 28 | 1,935 | 77.4% | 21.2% | D+56.2 |
| Precinct -TF.02TF.02 | 1,085 | 793 | 21 | 1,899 | 57.1% | 41.8% | D+15.4 |
| Precinct -IC.23IC.23 | 1,512 | 359 | 27 | 1,898 | 79.7% | 18.9% | D+60.7 |
| Precinct -IC.01IC.01 | 1,483 | 390 | 19 | 1,892 | 78.4% | 20.6% | D+57.8 |
| Precinct -TF.01/CCTF.01/CC | 1,059 | 800 | 25 | 1,884 | 56.2% | 42.5% | D+13.7 |
| Precinct -SOSO | 886 | 953 | 24 | 1,863 | 47.6% | 51.2% | R+3.6 |
| Precinct -PN/CV ANXPN/CV ANX | 1,221 | 591 | 26 | 1,838 | 66.4% | 32.2% | D+34.3 |
| Precinct -IC.24IC.24 | 1,347 | 452 | 28 | 1,827 | 73.7% | 24.7% | D+49.0 |
| Precinct -IC.06IC.06 | 1,441 | 334 | 19 | 1,794 | 80.3% | 18.6% | D+61.7 |
| Precinct -JE/SHJE/SH | 810 | 921 | 20 | 1,751 | 46.3% | 52.6% | R+6.3 |
| Precinct -IC.02IC.02 | 1,338 | 360 | 25 | 1,723 | 77.7% | 20.9% | D+56.8 |
| Precinct -IC.20IC.20 | 1,244 | 449 | 24 | 1,717 | 72.5% | 26.2% | D+46.3 |
| Precinct -IC.11IC.11 | 1,095 | 571 | 22 | 1,688 | 64.9% | 33.8% | D+31.0 |
| Precinct -NPNP | 990 | 679 | 10 | 1,679 | 59.0% | 40.4% | D+18.5 |
| Precinct -NL.02NL.02 | 1,068 | 592 | 18 | 1,678 | 63.6% | 35.3% | D+28.4 |
| Precinct -NL.07/MD.85NL.07/MD.85 | 1,077 | 578 | 23 | 1,678 | 64.2% | 34.4% | D+29.7 |
| Precinct -CV.07CV.07 | 1,228 | 424 | 23 | 1,675 | 73.3% | 25.3% | D+48.0 |
| Precinct -IC.04IC.04 | 1,367 | 247 | 17 | 1,631 | 83.8% | 15.1% | D+68.7 |
| Precinct -IC.22/ELNIC.22/ELN | 1,303 | 282 | 19 | 1,604 | 81.2% | 17.6% | D+63.7 |
| Precinct -JW/MN/SWJW/MN/SW | 724 | 842 | 17 | 1,583 | 45.7% | 53.2% | R+7.5 |
| Precinct -IC.21IC.21 | 1,154 | 373 | 38 | 1,565 | 73.7% | 23.8% | D+49.9 |
| Precinct -IC.14IC.14 | 1,322 | 211 | 24 | 1,557 | 84.9% | 13.6% | D+71.4 |
| Precinct -NL.03NL.03 | 960 | 572 | 15 | 1,547 | 62.1% | 37.0% | D+25.1 |
| Precinct -IC.25IC.25 | 1,247 | 276 | 12 | 1,535 | 81.2% | 18.0% | D+63.3 |
| Precinct -CV.03CV.03 | 1,037 | 459 | 14 | 1,510 | 68.7% | 30.4% | D+38.3 |
| Precinct -IC.08IC.08 | 1,099 | 365 | 14 | 1,478 | 74.4% | 24.7% | D+49.7 |
| Precinct -IC.19IC.19 | 958 | 492 | 20 | 1,470 | 65.2% | 33.5% | D+31.7 |
| Precinct -NL.01NL.01 | 913 | 507 | 21 | 1,441 | 63.4% | 35.2% | D+28.2 |
| Precinct -IC.18IC.18 | 1,244 | 162 | 18 | 1,424 | 87.4% | 11.4% | D+76.0 |
| Precinct -IC.09IC.09 | 1,121 | 269 | 22 | 1,412 | 79.4% | 19.1% | D+60.3 |
| Precinct -NL.06NL.06 | 862 | 478 | 27 | 1,367 | 63.1% | 35.0% | D+28.1 |
| Precinct -NL.05NL.05 | 940 | 395 | 22 | 1,357 | 69.3% | 29.1% | D+40.2 |
| Precinct -IC.13IC.13 | 990 | 328 | 26 | 1,344 | 73.7% | 24.4% | D+49.3 |
| Precinct -CV.01CV.01 | 970 | 352 | 18 | 1,340 | 72.4% | 26.3% | D+46.1 |
| Precinct -IC.05IC.05 | 887 | 426 | 12 | 1,325 | 66.9% | 32.2% | D+34.8 |
| Precinct -BG/SO ANXBG/SO ANX | 598 | 699 | 16 | 1,313 | 45.5% | 53.2% | R+7.7 |
| Precinct -IC.03IC.03 | 780 | 512 | 18 | 1,310 | 59.5% | 39.1% | D+20.5 |
| Precinct -NL.04NL.04 | 897 | 383 | 19 | 1,299 | 69.1% | 29.5% | D+39.6 |
| Precinct -IC.12IC.12 | 980 | 286 | 23 | 1,289 | 76.0% | 22.2% | D+53.8 |
| Precinct -NL.08NL.08 | 836 | 431 | 22 | 1,289 | 64.9% | 33.4% | D+31.4 |
| Precinct -CV.04CV.04 | 990 | 272 | 21 | 1,283 | 77.2% | 21.2% | D+56.0 |
| Precinct -IC.26IC.26 | 935 | 274 | 14 | 1,223 | 76.5% | 22.4% | D+54.0 |
| Precinct -IC.10/ELSWIC.10/ELSW | 813 | 340 | 18 | 1,171 | 69.4% | 29.0% | D+40.4 |
| Precinct -FR/LN/LTFR/LN/LT | 520 | 599 | 19 | 1,138 | 45.7% | 52.6% | R+6.9 |
| Precinct -IC.15/ELSEIC.15/ELSE | 727 | 268 | 16 | 1,011 | 71.9% | 26.5% | D+45.4 |
| Precinct -CV.05CV.05 | 773 | 220 | 15 | 1,008 | 76.7% | 21.8% | D+54.9 |
| Precinct -HS/LB/PVHS/LB/PV | 545 | 445 | 11 | 1,001 | 54.4% | 44.5% | D+10.0 |
| Precinct -IC.07IC.07 | 738 | 230 | 8 | 976 | 75.6% | 23.6% | D+52.0 |
| Precinct -CV.08CV.08 | 749 | 206 | 12 | 967 | 77.5% | 21.3% | D+56.2 |
| Precinct -SC/WB/IC ANXSC/WB/IC ANX | 580 | 340 | 13 | 933 | 62.2% | 36.4% | D+25.7 |
| Precinct -OXOX | 411 | 467 | 16 | 894 | 46.0% | 52.2% | R+6.3 |
| Precinct -IC.27IC.27 | 606 | 187 | 10 | 803 | 75.5% | 23.3% | D+52.2 |
| Precinct -UHUH | 608 | 151 | 6 | 765 | 79.5% | 19.7% | D+59.7 |
| Precinct -WLWL | 374 | 206 | 5 | 585 | 63.9% | 35.2% | D+28.7 |
| Precinct -WSWS | 206 | 318 | 12 | 536 | 38.4% | 59.3% | R+20.9 |
| Precinct -UNUN | 251 | 207 | 5 | 463 | 54.2% | 44.7% | D+9.5 |
| Precinct -CECE | 173 | 228 | 5 | 406 | 42.6% | 56.2% | R+13.5 |
| Precinct -HDHD | 181 | 193 | 7 | 381 | 47.5% | 50.7% | R+3.1 |
| Precinct -SNSN | 137 | 232 | 4 | 373 | 36.7% | 62.2% | R+25.5 |
| Precinct -MDMD | 173 | 161 | 4 | 338 | 51.2% | 47.6% | D+3.6 |
| Precinct -GRGR | 195 | 134 | 1 | 330 | 59.1% | 40.6% | D+18.5 |
| Precinct -CV.09CV.09 | 23 | 19 | 1 | 43 | 53.5% | 44.2% | D+9.3 |
presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | +18.9% |
| 1896 | +4.2% |
| 1900 | +2.7% |
| 1904 | +2.0% |
| 1908 | +9.0% |
| 1912 | +28.6% |
| 1916 | +14.8% |
| 1920 | −6.1% |
| 1924 | −9.1% |
| 1928 | −0.7% |
| 1932 | +22.6% |
| 1936 | +21.5% |
| 1940 | +11.1% |
| 1944 | +13.7% |
| 1948 | +9.0% |
| 1952 | −16.4% |
| 1956 | −12.6% |
| 1960 | −1.7% |
| 1964 | +36.3% |
| 1968 | +8.3% |
| 1972 | +16.8% |
| 1976 | +10.6% |
| 1980 | +15.1% |
| 1984 | +16.3% |
| 1988 | +29.8% |
| 1992 | +28.2% |
| 1996 | +31.7% |
| 2000 | +25.2% |
| 2004 | +29.3% |
| 2008 | +41.5% |
| 2012 | +35.5% |
| 2016 | +37.6% |
| 2020 | +43.2% |
| 2024 | +37.8% |
DemocraticRepublican
Federal and statewide elections · 3 House · 37 Senate · 2 Senate special · 12 governor
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.
U.S. Senate
Each row shows U.S. Senate votes counted inside this Place. “Vote lead” is the local lead here, not necessarily the winner of the full contest.
U.S. Senate special elections
Each row shows U.S. Senate special votes counted inside this Place. “Vote lead” is the local lead here, not necessarily the winner of the full contest.
Governor
Each row shows Governor 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+29.4
Presidential vote · 2024D+37.8
Registration leans Democratic; the presidential vote runs 8.4 points more Republican.
DemocraticRepublicanUnaffiliatedOther parties
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2008 | 102,789 | 47,400 | 19,301 | 35,940 | 148 |
| 2010 | 106,307 | 46,911 | 20,978 | 38,094 | 324 |
| 2012 | 113,238 | 48,707 | 22,736 | 41,366 | 429 |
| 2014 | 111,011 | 47,131 | 22,048 | 41,163 | 669 |
| 2016 | 111,253 | 51,105 | 22,799 | 36,360 | 989 |
| 2018 | 111,696 | 51,399 | 21,333 | 37,829 | 1,135 |
| 2020 | 113,941 | 58,472 | 21,013 | 33,368 | 1,088 |
| 2022 | 114,126 | 56,723 | 20,394 | 35,940 | 1,069 |
| 2024 | 115,249 | 54,599 | 20,756 | 38,772 | 1,122 |
domestic migration
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
−175 net domestic migration · 2025
20112025
Net +1,237 over 2011–2025 · gain loss
Arrivals reported $61,573 in average income, against $105,068 for residents who stayed — 41% lower. (IRS SOI, 2022–23)
The places arrivals came from lean D+1.7 on average — 36 points more Republican-leaning than Johnson County, IA itself (D+37.8).
Where arrivals came from lean of each source
- Linn County, IA639D+9.9
- Polk County, IA227D+10.8
- Scott County, IA159R+3.9
- Cook County, IL146D+41.6
- Washington County, IA121R+24.4
- Muscatine County, IA119R+14.9
Where departures went households, 2022–23
- Linn County, IA743
- Polk County, IA276
- Cook County, IL228
- Washington County, IA152
- Scott County, IA147
- Cedar County, IA122
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 | +455 |
| 2012 | +1,152 |
| 2013 | +884 |
| 2014 | +389 |
| 2015 | +235 |
| 2016 | +11 |
| 2017 | +336 |
| 2018 | −320 |
| 2019 | −855 |
| 2021 | +668 |
| 2022 | 0 |
| 2023 | −862 |
| 2024 | −681 |
| 2025 | −175 |
Home to the University of Iowa in Iowa City, Johnson County delivers Democratic margins above 35 points in cycles where the rest of the state trends Republican — a pattern driven by a student and academic-professional population that skews younger and more educated than Iowa's norm.
Across the recorded series it reached a Democratic high of 43.2 points in 2020 and a Republican high of 16.4 points in 1952. Between 2020 and 2024 the county moved 5.4 points toward the Republican candidate; the 2024 margin was 37.8 points.
A population of 156,639, a 75% non-Hispanic-white share, and a median household income of $74,935 describe the county. The county's voting pattern over the last decade is most similar to that of Dane County and Polk County.
Political twins — counties
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Dane County
Wisconsin
96.4twin score
2004–2024 trajectory≠ Polish ancestry
Polk County
Iowa
96.0twin score
2012–2024 trajectory≠ college share
Tompkins County
New York
95.7twin score
2008–2024 trajectory≠ % Asian
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 →
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All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Johnson County, Iowa. Akashic. https://akashic.app/county/19103/. Accessed May 20, 2026. License: CC BY 4.0.
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Cities & towns in Johnson County
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Frequently asked questions
How did Johnson County, Iowa vote in 2024?
In 2024, Johnson County, Iowa voted Democratic by 37.8 points (D+37.8), carried by the Democratic candidate. Out of 86,644 votes cast, 58,846 went Democratic and 26,087 went Republican.
When did Johnson County, Iowa last vote Republican?
The most recent presidential election in which Johnson County, Iowa voted Republican was 1960.
How many people live in Johnson County, Iowa?
Johnson County, Iowa has a population of 156,639 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Johnson County, Iowa?
Median household income in Johnson County, Iowa is $74,935 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Johnson County, Iowa?
Akashic tracks 38 presidential elections in Johnson County, Iowa from 1876 to 2024. Of those, 28 went Democratic and 6 went Republican.