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Iowa's 4th Congressional District
The current officeholder, the 2024 result, and a precinct-level model you can run yourself — built from how Iowa actually voted.
Model Iowa's 4th Congressional District →
Current officeholder
Randy Feenstra Republican
2024 result
Republican R+34.4
2024 votes cast
372,697
Office
U.S. House
Who lives in this district
This district is home to about 795,592 people, median age 38.7, median household income $70,703.
Population
795,592
Median age
38.7
Median household income
$70,703
Bachelor's degree or higher
26.3%
Race & ethnicity: White 82.5% · Black 1.9% · Hispanic 9.9% · Asian 2.1%
Source: U.S. Census Bureau, 2019–2023 American Community Survey (5-year).
Precinct results — 2024 general
462 precincts reported in Iowa's 4th Congressional District's 2024 general election. The twenty largest:
| Precinct | Winner | Margin | Votes |
|---|---|---|---|
| 19127-Marshalltown City Ward 3 | Republican | R+8.0 | 3,136 |
| 19127-Marshalltown City Ward 2 | Republican | R+1.5 | 2,645 |
| 19193-28 East High School | Republican | R+37.4 | 2,404 |
| 19127-Marshalltown City Ward 4 | Republican | R+3.6 | 2,392 |
| 19155-CB 22 | Republican | R+30.5 | 2,121 |
| 19155-GARNER | Republican | R+39.2 | 1,992 |
| 19149-#2-Le Mars Convention Center | Republican | R+50.6 | 1,879 |
| 19193-29 East High School | Republican | R+30.8 | 1,864 |
| 19167-Sioux Center #4 | Republican | R+81.0 | 1,829 |
| 19081-Precinct #6 | Republican | R+45.8 | 1,813 |
| 19129-Oak/St. Mary | Republican | R+45.2 | 1,781 |
| 19059-Precinct No. 9 | Republican | R+47.9 | 1,775 |
| 19169-AMES 8 | Democratic | D+31.1 | 1,775 |
| 19155-CB 10 | Republican | R+12.6 | 1,755 |
| 19155-UNDERWOOD | Republican | R+41.6 | 1,749 |
| 19169-AMES 9 | Democratic | D+26.1 | 1,741 |
| 19169-AMES 7/FRANKLIN TWP 2 | Democratic | D+9.6 | 1,716 |
| 19167-Orange City #2/Holland SE | Republican | R+69.9 | 1,712 |
| 19155-TREYNOR | Republican | R+53.8 | 1,710 |
| 19167-Orange City #1/Holland SW | Republican | R+69.6 | 1,708 |
All 462 precincts are modelable — open the race in the simulator and drill to precinct grain.
Find your district
Enter a ZIP code or a district (e.g. NC-4) to find your U.S. House district and who represents it.
Model Iowa's 4th Congressional District in five steps
- Set the candidates. Name the contenders for the Iowa's 4th Congressional District (or keep the generic Democrat / Republican defaults). The map starts from the canonical mixed-grain 2024 presidential baseline.
- Apply a swing. Move vote share statewide, or by demographic cohort, with a slider. The map and the running tally recompute instantly.
- Model turnout. Mobilize or depress turnout for any group — turnout and persuasion are modeled separately, the way a real campaign thinks about them.
- Explore local geography. Zoom from the state through counties to the finest supported reporting grain and adjust the places available in the model.
- Roll up & share. Roll the result up to chamber control, then share the exact versioned scenario.
Open Iowa's 4th Congressional District in the simulator →