Johnson County, Iowa
Latest: 2024
Safe Democratic — shifted 5.4pp toward Republicans in 2024 — 40 presidential elections on record
Race & ancestry
| Group | % |
|---|---|
▶White (Non-Hispanic)(13) | 74.8% |
▶Hispanic / Latino(17) | 6.7% |
▶Black / African American(13) | 7.7% |
▶Asian(6) | 5.6% |
▶Middle Eastern / North African(10) | 0.9% |
▶Native American / Alaska Native(2) | 0.2% |
Multiracial / Other | 4.9% |
Religious adherence
| Tradition | % Pop | % Adherents |
|---|---|---|
| Catholic | 11.7% | 39.1% |
| Mainline Protestant | 8.0% | 26.6% |
| Evangelical Protestant | 6.1% | 20.4% |
| Other | 4.0% | 13.3% |
| LDS (Mormon) | 1.6% | 5.5% |
| Black Protestant | 0.1% | 0.4% |
| Non-religious | 70.1% | — |
Presidential results
| Year | Result |
|---|---|
| 2024 | Harris+37.8 |
| 2020 | Biden+43.2 |
| 2016 | Clinton+37.6 |
| 2012 | Obama+35.5 |
| 2008 | Obama+41.5 |
| 2004 | Kerry+29.3 |
| 2000 | Gore+25.2 |
| 1996 | Clinton+31.7 |
| 1992 | Clinton+28.2 |
Johnson, Iowa is a county that has a population of 156,639. In the 2024 presidential election, it voted Democratic with a margin of D+37.8. Akashic Edge tracks 40 presidential elections here, dating back to 1868.
| Year | Dem % | Rep % | Margin | Swing |
|---|---|---|---|---|
| 2024 | 67.9% | 30.1% | D+37.8 | R+5.4 |
| 2020 | 70.6% | 27.3% | D+43.2 | D+5.6 |
| 2016 | 64.8% | 27.2% | D+37.6 | D+2.1 |
| 2012 | 66.7% | 31.2% | D+35.5 | R+6.0 |
| 2008 | 69.9% | 28.4% | D+41.5 | D+12.2 |
| 2004 | 64.0% | 34.7% | D+29.3 | D+4.1 |
| 2000 | 59.1% | 33.9% | D+25.2 | R+6.5 |
| 1996 | 61.0% | 29.3% | D+31.7 | D+3.4 |
| 1992 | 55.3% | 27.1% | D+28.2 | R+1.6 |
| 1988 | 64.4% | 34.6% | D+29.8 | D+13.5 |
| 1984 | 57.7% | 41.5% | D+16.3 | D+1.2 |
| 1980 | 46.8% | 31.7% | D+15.1 | D+4.4 |
| 1976 | 52.2% | 41.6% | D+10.6 | R+6.2 |
| 1972 | 57.7% | 40.9% | D+16.8 | D+8.5 |
| 1968 | 52.2% | 43.9% | D+8.3 | R+28.0 |
| 1964 | 68.1% | 31.7% | D+36.3 | D+38.0 |
| 1960 | 49.1% | 50.8% | R+1.7 | D+10.9 |
| 1956 | 43.7% | 56.3% | R+12.6 | D+3.7 |
| 1952 | 41.7% | 58.0% | R+16.4 | R+25.4 |
| 1948 | 52.8% | 43.8% | D+9.0 | — |
What defines Johnson?
It has a predominantly white, college-educated electorate that has shifted sharply toward Democrats in the Trump era.
County in State Context
Current Iowa Polling
Contextual statewide polling for Iowa. County pages stay rooted in county returns, but live statewide polling helps frame the current cycle.
2026 Iowa Governor General Election
Rob Sand leads at 50.0%
1 pollsSparse
Field Preview
Ask the Historian
Explore this county's political evolution with the Historian
Key Insights
High-confidence patterns distilled from this geography's election history.
- Has voted Democratic in the last 5 presidential elections
- Latest election (2024) was a Democratic landslide with a 37.8% margin
- College attainment is 55% — 22pp above the national average. Similar education levels correlate with Democratic lean nationally