Overview
- District ID
- ia-hd-031
- State
- Iowa
- Chamber
- Lower chamber
- District Code
- 031
- Land Area
- 23.2 sq mi
- Water Area
- 0.96 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 1 place
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 3 | 32,047 | 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
- 23,591
- Active Voters
- 20,209 (85.7%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 8,328 | 35.3% |
| Republican | 7,188 | 30.5% |
| Unaffiliated | 7,852 | 33.3% |
| Other parties | 223 | 0.9% |
| No party recorded | 0 | 0.0% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 5,937 (25.2%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 18,892 (80.1%) | 1,400 (5.9%) | 292 (1.2%) |
| 2021–2022 | 14,523 (61.6%) | 2,652 (11.2%) | 1,721 (7.3%) |
| 2019–2020 | 18,019 (76.4%) | 3,846 (16.3%) | 1,675 (7.1%) |
| 2017–2018 | 14,035 (59.5%) | 2,689 (11.4%) | 624 (2.6%) |
| 2015–2016 | 14,442 (61.2%) | 894 (3.8%) | 377 (1.6%) |
| 2013–2014 | 10,059 (42.6%) | 268 (1.1%) | 1,550 (6.6%) |
| 2011–2012 | 12,671 (53.7%) | 150 (0.6%) | 612 (2.6%) |
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
- 33,757 (± 1,055)
- Median Age
- 36.5
- Median Household Income
- $90,396 (± $5,727)
- High School Graduate or Higher (age 25+)
- 96.4%
- Bachelor's Degree or Higher (age 25+)
- 56.6%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 7,627 | 22.6% |
| 18 to 64 | 20,810 | 61.6% |
| 65 and over | 5,320 | 15.8% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 2,581 | 7.6% |
| White, not Hispanic | 26,002 | 77.0% |
| Black, not Hispanic | 1,700 | 5.0% |
| Asian, not Hispanic | 1,824 | 5.4% |
| American Indian / Alaska Native, not Hispanic | 0 | 0.0% |
| Native Hawaiian / Pacific Islander, not Hispanic | 0 | 0.0% |
| Some other race, not Hispanic | 66 | 0.2% |
| Two or more races, not Hispanic | 1,584 | 4.7% |
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
- 31,636
- Citizen Voting Age Population (CVAP)
- 24,378
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 29,782 | 94.1% |
| Hispanic | 1,856 | 5.9% |
| White | 25,988 | 82.1% |
| Black | 1,545 | 4.9% |
| Asian | 985 | 3.1% |
| American Indian / Alaska Native | 0 | 0.0% |
| Native Hawaiian / Pacific Islander | 0 | 0.0% |
| Two or More Races | 19 | 0.1% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 23,242 | 95.3% |
| Hispanic | 1,137 | 4.7% |
| White | 20,727 | 85.0% |
| Black | 1,299 | 5.3% |
| Asian | 1,123 | 4.6% |
| American Indian / Alaska Native | 74 | 0.3% |
| Native Hawaiian / Pacific Islander | 1 | 0.0% |
| Two or More Races | 16 | 0.1% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
