Overview
- District ID
- ia-hd-066
- State
- Iowa
- Chamber
- Lower chamber
- District Code
- 066
- Land Area
- 1,103.7 sq mi
- Water Area
- 14.5 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 21 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 1 | 31,980 | 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
- 21,956
- Active Voters
- 19,311 (88.0%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 4,749 | 21.6% |
| Republican | 8,758 | 39.9% |
| Unaffiliated | 8,331 | 37.9% |
| Other parties | 118 | 0.5% |
| No party recorded | 0 | 0.0% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 3,718 (16.9%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 17,894 (81.5%) | 319 (1.5%) | 1,964 (8.9%) |
| 2021–2022 | 13,117 (59.7%) | 1,067 (4.9%) | 2,783 (12.7%) |
| 2019–2020 | 16,903 (77.0%) | 2,897 (13.2%) | 3,233 (14.7%) |
| 2017–2018 | 12,564 (57.2%) | 1,142 (5.2%) | 1,242 (5.7%) |
| 2015–2016 | 14,233 (64.8%) | 770 (3.5%) | 739 (3.4%) |
| 2013–2014 | 10,114 (46.1%) | 569 (2.6%) | 1,223 (5.6%) |
| 2011–2012 | 12,818 (58.4%) | 247 (1.1%) | 541 (2.5%) |
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
- 32,374 (± 317)
- Median Age
- 43.4
- Median Household Income
- $75,944 (± $3,546)
- High School Graduate or Higher (age 25+)
- 94.7%
- Bachelor's Degree or Higher (age 25+)
- 21.2%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 6,833 | 21.1% |
| 18 to 64 | 18,591 | 57.4% |
| 65 and over | 6,950 | 21.5% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 781 | 2.4% |
| White, not Hispanic | 30,074 | 92.9% |
| Black, not Hispanic | 561 | 1.7% |
| Asian, not Hispanic | 150 | 0.5% |
| American Indian / Alaska Native, not Hispanic | 29 | 0.1% |
| Native Hawaiian / Pacific Islander, not Hispanic | 0 | 0.0% |
| Some other race, not Hispanic | 83 | 0.3% |
| Two or more races, not Hispanic | 696 | 2.1% |
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
- 32,114
- Citizen Voting Age Population (CVAP)
- 25,283
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 31,521 | 98.2% |
| Hispanic | 590 | 1.8% |
| White | 30,424 | 94.7% |
| Black | 561 | 1.7% |
| Asian | 142 | 0.4% |
| American Indian / Alaska Native | 33 | 0.1% |
| Native Hawaiian / Pacific Islander | 0 | 0.0% |
| Two or More Races | 2 | 0.0% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 24,925 | 98.6% |
| Hispanic | 361 | 1.4% |
| White | 24,070 | 95.2% |
| Black | 591 | 2.3% |
| Asian | 129 | 0.5% |
| American Indian / Alaska Native | 139 | 0.5% |
| Native Hawaiian / Pacific Islander | 0 | 0.0% |
| Two or More Races | 0 | 0.0% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
