Overview
- District ID
- ia-sd-040
- State
- Iowa
- Chamber
- Upper chamber (state senate)
- District Code
- 040
- Land Area
- 32.3 sq mi
- Water Area
- 0.62 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 |
|---|
| Linn County | 32.31 sq mi | 100.0% | 4.5% |
Showing all 1 county
Places
Showing all 3 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 2 | 64,145 | 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
- 43,359
- Active Voters
- 36,834 (85.0%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 15,092 | 34.8% |
| Republican | 11,775 | 27.2% |
| Unaffiliated | 16,003 | 36.9% |
| Other parties | 489 | 1.1% |
| No party recorded | 0 | 0.0% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 12,541 (28.9%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 34,009 (78.4%) | 770 (1.8%) | 696 (1.6%) |
| 2021–2022 | 25,860 (59.6%) | 4,159 (9.6%) | 2,577 (5.9%) |
| 2019–2020 | 32,632 (75.3%) | 6,821 (15.7%) | 3,365 (7.8%) |
| 2017–2018 | 24,949 (57.5%) | 3,920 (9.0%) | 935 (2.2%) |
| 2015–2016 | 26,871 (62.0%) | 2,407 (5.6%) | 457 (1.1%) |
| 2013–2014 | 19,417 (44.8%) | 2,071 (4.8%) | 2,038 (4.7%) |
| 2011–2012 | 24,585 (56.7%) | 1,106 (2.6%) | 886 (2.0%) |
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
- 63,697 (± 2,017)
- Median Age
- 39.2
- Median Household Income
- $75,931 (± $3,633)
- High School Graduate or Higher (age 25+)
- 94.8%
- Bachelor's Degree or Higher (age 25+)
- 34.2%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 13,518 | 21.2% |
| 18 to 64 | 39,361 | 61.8% |
| 65 and over | 10,818 | 17.0% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 3,541 | 5.6% |
| White, not Hispanic | 50,228 | 78.9% |
| Black, not Hispanic | 4,471 | 7.0% |
| Asian, not Hispanic | 2,243 | 3.5% |
| American Indian / Alaska Native, not Hispanic | 21 | 0.0% |
| Native Hawaiian / Pacific Islander, not Hispanic | 0 | 0.0% |
| Some other race, not Hispanic | 134 | 0.2% |
| Two or more races, not Hispanic | 3,059 | 4.8% |
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
- 61,746
- Citizen Voting Age Population (CVAP)
- 48,445
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 58,519 | 94.8% |
| Hispanic | 3,226 | 5.2% |
| White | 50,520 | 81.8% |
| Black | 3,774 | 6.1% |
| Asian | 1,591 | 2.6% |
| American Indian / Alaska Native | 38 | 0.1% |
| Native Hawaiian / Pacific Islander | 1 | 0.0% |
| Two or More Races | 253 | 0.4% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 46,516 | 96.0% |
| Hispanic | 1,930 | 4.0% |
| White | 41,622 | 85.9% |
| Black | 3,287 | 6.8% |
| Asian | 1,325 | 2.7% |
| American Indian / Alaska Native | 131 | 0.3% |
| Native Hawaiian / Pacific Islander | 1 | 0.0% |
| Two or More Races | 153 | 0.3% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
