Overview
- District ID
- ia-hd-055
- State
- Iowa
- Chamber
- Lower chamber
- District Code
- 055
- Land Area
- 1,409.6 sq mi
- Water Area
- 2.01 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 4 counties
Places
Showing all 25 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 | 32,027 | 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
- 20,702
- Active Voters
- 17,959 (86.8%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 4,055 | 19.6% |
| Republican | 9,587 | 46.3% |
| Unaffiliated | 6,918 | 33.4% |
| Other parties | 142 | 0.7% |
| No party recorded | 0 | 0.0% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 3,979 (19.2%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 16,552 (80.0%) | 254 (1.2%) | 1,818 (8.8%) |
| 2021–2022 | 12,405 (59.9%) | 1,023 (4.9%) | 2,223 (10.7%) |
| 2019–2020 | 15,660 (75.6%) | 1,845 (8.9%) | 3,364 (16.2%) |
| 2017–2018 | 12,105 (58.5%) | 1,154 (5.6%) | 1,350 (6.5%) |
| 2015–2016 | 13,422 (64.8%) | 472 (2.3%) | 2,343 (11.3%) |
| 2013–2014 | 9,901 (47.8%) | 237 (1.1%) | 1,860 (9.0%) |
| 2011–2012 | 12,156 (58.7%) | 178 (0.9%) | 1,093 (5.3%) |
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
- 31,631 (± 375)
- Median Age
- 41.7
- Median Household Income
- $72,039 (± $4,343)
- High School Graduate or Higher (age 25+)
- 93.6%
- Bachelor's Degree or Higher (age 25+)
- 25.1%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 7,677 | 24.3% |
| 18 to 64 | 17,313 | 54.7% |
| 65 and over | 6,641 | 21.0% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 3,512 | 11.1% |
| White, not Hispanic | 26,750 | 84.6% |
| Black, not Hispanic | 218 | 0.7% |
| Asian, not Hispanic | 376 | 1.2% |
| American Indian / Alaska Native, not Hispanic | 45 | 0.1% |
| Native Hawaiian / Pacific Islander, not Hispanic | 21 | 0.1% |
| Some other race, not Hispanic | 105 | 0.3% |
| Two or more races, not Hispanic | 604 | 1.9% |
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
- 30,068
- Citizen Voting Age Population (CVAP)
- 22,642
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 27,719 | 92.2% |
| Hispanic | 2,348 | 7.8% |
| White | 26,948 | 89.6% |
| Black | 220 | 0.7% |
| Asian | 81 | 0.3% |
| American Indian / Alaska Native | 45 | 0.1% |
| Native Hawaiian / Pacific Islander | 22 | 0.1% |
| Two or More Races | 16 | 0.1% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 21,678 | 95.7% |
| Hispanic | 962 | 4.2% |
| White | 21,182 | 93.6% |
| Black | 215 | 0.9% |
| Asian | 139 | 0.6% |
| American Indian / Alaska Native | 126 | 0.6% |
| Native Hawaiian / Pacific Islander | 0 | 0.0% |
| Two or More Races | 18 | 0.1% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
