Overview
- District ID
- ia-sd-012
- State
- Iowa
- Chamber
- Upper chamber (state senate)
- District Code
- 012
- Land Area
- 3,432.1 sq mi
- Water Area
- 18 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 9 counties
Places
Showing top 25 of 47 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 3 | 63,604 | 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
- 42,356
- Active Voters
- 36,562 (86.3%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 7,610 | 18.0% |
| Republican | 20,550 | 48.5% |
| Unaffiliated | 13,847 | 32.7% |
| Other parties | 349 | 0.8% |
| No party recorded | 0 | 0.0% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 7,589 (17.9%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 34,211 (80.8%) | 1,120 (2.6%) | 5,819 (13.7%) |
| 2021–2022 | 25,670 (60.6%) | 2,001 (4.7%) | 5,862 (13.8%) |
| 2019–2020 | 31,555 (74.5%) | 3,494 (8.2%) | 5,606 (13.2%) |
| 2017–2018 | 23,758 (56.1%) | 2,221 (5.2%) | 2,779 (6.6%) |
| 2015–2016 | 26,207 (61.9%) | 1,092 (2.6%) | 1,973 (4.7%) |
| 2013–2014 | 18,709 (44.2%) | 505 (1.2%) | 3,416 (8.1%) |
| 2011–2012 | 23,223 (54.8%) | 730 (1.7%) | 2,375 (5.6%) |
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
- 64,323 (± 397)
- Median Age
- 40.5
- Median Household Income
- $72,955 (± $1,525)
- High School Graduate or Higher (age 25+)
- 92.8%
- Bachelor's Degree or Higher (age 25+)
- 22.3%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 15,725 | 24.4% |
| 18 to 64 | 35,514 | 55.2% |
| 65 and over | 13,084 | 20.3% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 3,116 | 4.8% |
| White, not Hispanic | 58,281 | 90.6% |
| Black, not Hispanic | 414 | 0.6% |
| Asian, not Hispanic | 367 | 0.6% |
| American Indian / Alaska Native, not Hispanic | 18 | 0.0% |
| Native Hawaiian / Pacific Islander, not Hispanic | 14 | 0.0% |
| Some other race, not Hispanic | 125 | 0.2% |
| Two or more races, not Hispanic | 1,988 | 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
- 63,519
- Citizen Voting Age Population (CVAP)
- 47,935
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 60,919 | 95.9% |
| Hispanic | 2,602 | 4.1% |
| White | 58,848 | 92.6% |
| Black | 377 | 0.6% |
| Asian | 262 | 0.4% |
| American Indian / Alaska Native | 14 | 0.0% |
| Native Hawaiian / Pacific Islander | 14 | 0.0% |
| Two or More Races | 100 | 0.2% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 46,449 | 96.9% |
| Hispanic | 1,485 | 3.1% |
| White | 45,065 | 94.0% |
| Black | 373 | 0.8% |
| Asian | 388 | 0.8% |
| American Indian / Alaska Native | 542 | 1.1% |
| Native Hawaiian / Pacific Islander | 4 | 0.0% |
| Two or More Races | 73 | 0.2% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
