Overview
- District ID
- ia-sd-045
- State
- Iowa
- Chamber
- Upper chamber (state senate)
- District Code
- 045
- Land Area
- 22.8 sq mi
- Water Area
- 0.39 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 |
|---|
| Johnson County | 22.83 sq mi | 100.0% | 3.7% |
Showing all 1 county
Places
Showing all 2 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 | 63,987 | 100.0% | 8.0% | 100.0% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 46,917
- Active Voters
- 36,134 (77.0%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 24,505 | 52.2% |
| Republican | 6,013 | 12.8% |
| Unaffiliated | 15,945 | 34.0% |
| Other parties | 454 | 1.0% |
| No party recorded | 0 | 0.0% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 9,463 (20.2%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 34,486 (73.5%) | 3,598 (7.7%) | 481 (1.0%) |
| 2021–2022 | 23,720 (50.6%) | 7,539 (16.1%) | 818 (1.7%) |
| 2019–2020 | 29,116 (62.1%) | 9,989 (21.3%) | 1,036 (2.2%) |
| 2017–2018 | 20,728 (44.2%) | 6,808 (14.5%) | 358 (0.8%) |
| 2015–2016 | 19,784 (42.2%) | 3,375 (7.2%) | 155 (0.3%) |
| 2013–2014 | 14,177 (30.2%) | 2,896 (6.2%) | 691 (1.5%) |
| 2011–2012 | 16,398 (35.0%) | 1,899 (4.0%) | 348 (0.7%) |
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
- 65,727 (± 917)
- Median Age
- 25.7
- Median Household Income
- $55,529 (± $2,992)
- High School Graduate or Higher (age 25+)
- 96.5%
- Bachelor's Degree or Higher (age 25+)
- 57.7%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 8,761 | 13.3% |
| 18 to 64 | 48,760 | 74.2% |
| 65 and over | 8,206 | 12.5% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 5,409 | 8.2% |
| White, not Hispanic | 46,638 | 71.0% |
| Black, not Hispanic | 6,438 | 9.8% |
| Asian, not Hispanic | 3,913 | 6.0% |
| American Indian / Alaska Native, not Hispanic | 5 | 0.0% |
| Native Hawaiian / Pacific Islander, not Hispanic | 0 | 0.0% |
| Some other race, not Hispanic | 490 | 0.7% |
| Two or more races, not Hispanic | 2,834 | 4.3% |
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
- 61,213
- Citizen Voting Age Population (CVAP)
- 52,881
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 56,692 | 92.6% |
| Hispanic | 4,515 | 7.4% |
| White | 46,812 | 76.5% |
| Black | 5,259 | 8.6% |
| Asian | 2,461 | 4.0% |
| American Indian / Alaska Native | 7 | 0.0% |
| Native Hawaiian / Pacific Islander | 0 | 0.0% |
| Two or More Races | 92 | 0.2% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 49,392 | 93.4% |
| Hispanic | 3,490 | 6.6% |
| White | 42,046 | 79.5% |
| Black | 3,942 | 7.5% |
| Asian | 3,104 | 5.9% |
| American Indian / Alaska Native | 229 | 0.4% |
| Native Hawaiian / Pacific Islander | 0 | 0.0% |
| Two or More Races | 93 | 0.2% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
