Overview
- District ID
- ia-hd-100
- State
- Iowa
- Chamber
- Lower chamber
- District Code
- 100
- Land Area
- 428.4 sq mi
- Water Area
- 16.3 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
| County | Overlap | Share of district land | Share of county land |
|---|
| Lee County | 428.36 sq mi | 100.0% | 82.8% |
Showing all 1 county
Places
Showing all 11 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 | 31,871 | 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
- 19,908
- Active Voters
- 16,476 (82.8%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 5,969 | 30.0% |
| Republican | 6,450 | 32.4% |
| Unaffiliated | 7,329 | 36.8% |
| Other parties | 160 | 0.8% |
| No party recorded | 0 | 0.0% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 3,973 (20.0%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 15,031 (75.5%) | 341 (1.7%) | 1,352 (6.8%) |
| 2021–2022 | 10,379 (52.1%) | 949 (4.8%) | 993 (5.0%) |
| 2019–2020 | 13,863 (69.6%) | 2,311 (11.6%) | 1,513 (7.6%) |
| 2017–2018 | 9,856 (49.5%) | 1,385 (7.0%) | 507 (2.5%) |
| 2015–2016 | 11,496 (57.7%) | 1,529 (7.7%) | 273 (1.4%) |
| 2013–2014 | 7,545 (37.9%) | 1,651 (8.3%) | 471 (2.4%) |
| 2011–2012 | 10,317 (51.8%) | 1,390 (7.0%) | 436 (2.2%) |
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
- 31,097 (± 289)
- Median Age
- 43.6
- Median Household Income
- $61,117 (± $3,679)
- High School Graduate or Higher (age 25+)
- 92.2%
- Bachelor's Degree or Higher (age 25+)
- 21.1%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 6,594 | 21.2% |
| 18 to 64 | 17,555 | 56.5% |
| 65 and over | 6,948 | 22.3% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 1,079 | 3.5% |
| White, not Hispanic | 27,981 | 90.0% |
| Black, not Hispanic | 786 | 2.5% |
| Asian, not Hispanic | 185 | 0.6% |
| American Indian / Alaska Native, not Hispanic | 20 | 0.1% |
| Native Hawaiian / Pacific Islander, not Hispanic | 21 | 0.1% |
| Some other race, not Hispanic | 46 | 0.1% |
| Two or more races, not Hispanic | 979 | 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
- 30,790
- Citizen Voting Age Population (CVAP)
- 24,219
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 29,872 | 97.0% |
| Hispanic | 919 | 3.0% |
| White | 28,002 | 90.9% |
| Black | 806 | 2.6% |
| Asian | 172 | 0.6% |
| American Indian / Alaska Native | 20 | 0.1% |
| Native Hawaiian / Pacific Islander | 21 | 0.1% |
| Two or More Races | 106 | 0.3% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 23,639 | 97.6% |
| Hispanic | 577 | 2.4% |
| White | 22,316 | 92.1% |
| Black | 774 | 3.2% |
| Asian | 242 | 1.0% |
| American Indian / Alaska Native | 193 | 0.8% |
| Native Hawaiian / Pacific Islander | 8 | 0.0% |
| Two or More Races | 100 | 0.4% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
