Overview
- District ID
- ia-sd-004
- State
- Iowa
- Chamber
- Upper chamber (state senate)
- District Code
- 004
- Land Area
- 2,437.8 sq mi
- Water Area
- 9.8 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 4 counties
Places
Showing top 25 of 45 places
Overlapping Congressional Districts
| Congressional district | Population in both | Share of this district's population | Share of the congressional district's population | Share of this district's land |
|---|
| IA District 4 | 63,818 | 100.0% | 8.0% | 100.0% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 41,090
- Active Voters
- 34,650 (84.3%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 8,156 | 19.8% |
| Republican | 18,995 | 46.2% |
| Unaffiliated | 13,615 | 33.1% |
| Other parties | 324 | 0.8% |
| No party recorded | 0 | 0.0% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 12,203 (29.7%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 30,875 (75.1%) | 467 (1.1%) | 4,613 (11.2%) |
| 2021–2022 | 22,245 (54.1%) | 1,690 (4.1%) | 4,126 (10.0%) |
| 2019–2020 | 29,036 (70.7%) | 3,510 (8.5%) | 6,238 (15.2%) |
| 2017–2018 | 21,823 (53.1%) | 1,980 (4.8%) | 2,727 (6.6%) |
| 2015–2016 | 24,429 (59.5%) | 1,067 (2.6%) | 2,618 (6.4%) |
| 2013–2014 | 17,728 (43.1%) | 1,084 (2.6%) | 2,021 (4.9%) |
| 2011–2012 | 21,892 (53.3%) | 473 (1.2%) | 1,472 (3.6%) |
Turnout counts today's registered voters with a counted ballot in the cycle's elections (the odd and even year), as a share of today's registered voters. Voters who have since left the rolls are not counted.
Browse the voter list for this district (premium access; sign-in required)
Source: Civitech voter file snapshot as of 01/20/2026. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".
Demographics
- Total Population
- 63,424
- Median Age
- 41.2
- Median Household Income
- $68,130 (± $3,516)
- High School Graduate or Higher (age 25+)
- 92.7%
- Bachelor's Degree or Higher (age 25+)
- 21.7%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 13,764 | 21.7% |
| 18 to 64 | 35,984 | 56.7% |
| 65 and over | 13,676 | 21.6% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 3,539 | 5.6% |
| White, not Hispanic | 55,035 | 86.8% |
| Black, not Hispanic | 1,450 | 2.3% |
| Asian, not Hispanic | 506 | 0.8% |
| American Indian / Alaska Native, not Hispanic | 68 | 0.1% |
| Native Hawaiian / Pacific Islander, not Hispanic | 72 | 0.1% |
| Some other race, not Hispanic | 159 | 0.3% |
| Two or more races, not Hispanic | 2,595 | 4.1% |
Source: U.S. Census Bureau, American Community Survey 2020-2024 ACS 5-year estimates (tables B01001, B01002, B01003, B03002, B15003, B19013) for this state legislative district. Estimates are survey-based; ± figures are 90% margins of error.
Citizen Voting Age Population
- Total Citizen Population
- 62,152
- Citizen Voting Age Population (CVAP)
- 48,643
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 59,332 | 95.5% |
| Hispanic | 2,822 | 4.5% |
| White | 55,640 | 89.5% |
| Black | 1,458 | 2.3% |
| Asian | 208 | 0.3% |
| American Indian / Alaska Native | 68 | 0.1% |
| Native Hawaiian / Pacific Islander | 15 | 0.0% |
| Two or More Races | 124 | 0.2% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 47,003 | 96.6% |
| Hispanic | 1,646 | 3.4% |
| White | 44,448 | 91.4% |
| Black | 1,755 | 3.6% |
| Asian | 277 | 0.6% |
| American Indian / Alaska Native | 431 | 0.9% |
| Native Hawaiian / Pacific Islander | 3 | 0.0% |
| Two or More Races | 90 | 0.2% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
