Iowa State Senate District 3

State Legislative District Profile (Upper Chamber)

Overview

District ID
ia-sd-003
State
Iowa
Chamber
Upper chamber (state senate)
District Code
003
Land Area
2,232.3 sq mi
Water Area
7.89 sq mi

Boundary

Boundary of Iowa State Senate District 3

Boundary as GeoJSON

Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.

Counties

CountyOverlapShare of district landShare of county land
Buena Vista County574.90 sq mi25.8%100.0%
O'Brien County573.04 sq mi25.7%100.0%
Osceola County398.69 sq mi17.9%100.0%
Clay County362.39 sq mi16.2%63.9%
Cherokee County323.32 sq mi14.5%56.0%

Showing all 5 counties

Places

PlaceOverlapShare of district landShare of place land
Spencer city10.95 sq mi0.5%100.0%
Cherokee city6.76 sq mi0.3%98.9%
Storm Lake city5.38 sq mi0.2%99.1%
Sheldon city4.03 sq mi0.2%83.9%
Sanborn city1.88 sq mi0.1%100.0%
Sibley city1.79 sq mi0.1%100.0%
Primghar city1.34 sq mi0.1%98.8%
Hartley city1.33 sq mi0.1%100.0%
Newell city1.26 sq mi0.1%100.0%
Ocheyedan city1.13 sq mi0.1%100.0%
Alta city1.08 sq mi<0.1%100.0%
Aurelia city1.01 sq mi<0.1%100.0%
Ashton city1.01 sq mi<0.1%90.2%
Harris city1.00 sq mi<0.1%100.0%
Paullina city0.93 sq mi<0.1%100.0%
Sutherland city0.85 sq mi<0.1%99.9%
Sioux Rapids city0.82 sq mi<0.1%99.9%
Marathon city0.75 sq mi<0.1%100.0%
Linn Grove city0.56 sq mi<0.1%100.0%
Albert City city0.54 sq mi<0.1%100.0%
Peterson city0.52 sq mi<0.1%100.0%
Webb city0.50 sq mi<0.1%100.0%
Royal city0.30 sq mi<0.1%100.0%
Calumet city0.27 sq mi<0.1%100.0%
Rembrandt city0.23 sq mi<0.1%100.0%

Showing top 25 of 33 places

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
IA District 463,782100.0%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
38,715
Active Voters
32,577 (84.1%)

Party Registration

PartyVotersShare
Democratic6,34816.4%
Republican21,09754.5%
Unaffiliated10,96628.3%
Other parties3040.8%
No party recorded00.0%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–20268,955 (23.1%)0 (0.0%)0 (0.0%)
2023–202429,776 (76.9%)275 (0.7%)4,732 (12.2%)
2021–202221,021 (54.3%)955 (2.5%)5,764 (14.9%)
2019–202028,004 (72.3%)2,090 (5.4%)7,296 (18.8%)
2017–201820,705 (53.5%)1,150 (3.0%)3,733 (9.6%)
2015–201623,587 (60.9%)394 (1.0%)6,757 (17.5%)
2013–201416,612 (42.9%)390 (1.0%)4,378 (11.3%)
2011–201220,523 (53.0%)244 (0.6%)3,489 (9.0%)

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
63,683 (± 348)
Median Age
39.3
Median Household Income
$68,836 (± $2,620)
High School Graduate or Higher (age 25+)
88.5%
Bachelor's Degree or Higher (age 25+)
23.4%

Population by Age

GroupPeopleShare
Under 1815,63724.6%
18 to 6435,12155.1%
65 and over12,92520.3%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)9,10514.3%
White, not Hispanic48,55576.2%
Black, not Hispanic1,0061.6%
Asian, not Hispanic2,2353.5%
American Indian / Alaska Native, not Hispanic1290.2%
Native Hawaiian / Pacific Islander, not Hispanic6301.0%
Some other race, not Hispanic1510.2%
Two or more races, not Hispanic1,8722.9%

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
59,600
Citizen Voting Age Population (CVAP)
44,322

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic53,00888.9%
Hispanic6,59611.1%
White49,20582.6%
Black8241.4%
Asian1,3382.2%
American Indian / Alaska Native1300.2%
Native Hawaiian / Pacific Islander4150.7%
Two or More Races370.1%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic41,06792.7%
Hispanic3,2557.3%
White39,05988.1%
Black6041.4%
Asian8782.0%
American Indian / Alaska Native2940.7%
Native Hawaiian / Pacific Islander2130.5%
Two or More Races280.1%

Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).