Overview
- District ID
- ia-hd-015
- State
- Iowa
- Chamber
- Lower chamber
- District Code
- 015
- Land Area
- 968.5 sq mi
- Water Area
- 8.12 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 2 counties
Places
Showing all 19 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 | 31,749 | 100.0% | 4.0% | 100.0% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 23,276
- Active Voters
- 20,702 (88.9%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 4,606 | 19.8% |
| Republican | 12,170 | 52.3% |
| Unaffiliated | 6,270 | 26.9% |
| Other parties | 230 | 1.0% |
| No party recorded | 0 | 0.0% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 5,057 (21.7%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 19,429 (83.5%) | 290 (1.2%) | 2,019 (8.7%) |
| 2021–2022 | 13,592 (58.4%) | 743 (3.2%) | 3,298 (14.2%) |
| 2019–2020 | 17,971 (77.2%) | 1,971 (8.5%) | 4,382 (18.8%) |
| 2017–2018 | 12,956 (55.7%) | 807 (3.5%) | 1,351 (5.8%) |
| 2015–2016 | 14,664 (63.0%) | 357 (1.5%) | 913 (3.9%) |
| 2013–2014 | 9,456 (40.6%) | 176 (0.8%) | 1,862 (8.0%) |
| 2011–2012 | 12,826 (55.1%) | 295 (1.3%) | 1,821 (7.8%) |
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
- 31,537 (± 928)
- Median Age
- 43.0
- Median Household Income
- $93,096 (± $4,814)
- High School Graduate or Higher (age 25+)
- 95.3%
- Bachelor's Degree or Higher (age 25+)
- 30.1%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 7,580 | 24.0% |
| 18 to 64 | 17,593 | 55.8% |
| 65 and over | 6,364 | 20.2% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 692 | 2.2% |
| White, not Hispanic | 29,376 | 93.1% |
| Black, not Hispanic | 276 | 0.9% |
| Asian, not Hispanic | 97 | 0.3% |
| American Indian / Alaska Native, not Hispanic | 35 | 0.1% |
| Native Hawaiian / Pacific Islander, not Hispanic | 0 | 0.0% |
| Some other race, not Hispanic | 92 | 0.3% |
| Two or more races, not Hispanic | 969 | 3.1% |
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
- 31,414
- Citizen Voting Age Population (CVAP)
- 23,829
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 30,768 | 97.9% |
| Hispanic | 642 | 2.0% |
| White | 29,700 | 94.5% |
| Black | 278 | 0.9% |
| Asian | 85 | 0.3% |
| American Indian / Alaska Native | 35 | 0.1% |
| Native Hawaiian / Pacific Islander | 1 | 0.0% |
| Two or More Races | 80 | 0.3% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 23,402 | 98.2% |
| Hispanic | 428 | 1.8% |
| White | 22,839 | 95.8% |
| Black | 208 | 0.9% |
| Asian | 106 | 0.4% |
| American Indian / Alaska Native | 188 | 0.8% |
| Native Hawaiian / Pacific Islander | 2 | 0.0% |
| Two or More Races | 62 | 0.3% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
