Iowa State Senate District 25

State Legislative District Profile (Upper Chamber)

Overview

District ID
ia-sd-025
State
Iowa
Chamber
Upper chamber (state senate)
District Code
025
Land Area
52.9 sq mi
Water Area
0.34 sq mi

Boundary

Boundary of Iowa State Senate District 25

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Story County52.89 sq mi100.0%9.2%

Showing all 1 county

Places

PlaceOverlapShare of district landShare of place land
Ames city24.06 sq mi45.5%85.3%

Showing all 1 place

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 463,738100.0%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
39,362
Active Voters
30,409 (77.3%)

Party Registration

PartyVotersShare
Democratic14,15336.0%
Republican8,70322.1%
Unaffiliated16,06740.8%
Other parties4391.1%
No party recorded00.0%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–20265,717 (14.5%)0 (0.0%)0 (0.0%)
2023–202428,218 (71.7%)894 (2.3%)790 (2.0%)
2021–202219,776 (50.2%)3,878 (9.9%)1,604 (4.1%)
2019–202024,730 (62.8%)5,699 (14.5%)2,112 (5.4%)
2017–201817,680 (44.9%)4,122 (10.5%)891 (2.3%)
2015–201617,261 (43.9%)1,725 (4.4%)805 (2.0%)
2013–201412,360 (31.4%)1,414 (3.6%)1,393 (3.5%)
2011–201214,306 (36.3%)286 (0.7%)401 (1.0%)

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
64,590 (± 586)
Median Age
22.9
Median Household Income
$60,995 (± $2,288)
High School Graduate or Higher (age 25+)
97.8%
Bachelor's Degree or Higher (age 25+)
65.2%

Population by Age

GroupPeopleShare
Under 187,39911.5%
18 to 6450,00377.4%
65 and over7,18811.1%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)3,3205.1%
White, not Hispanic49,36376.4%
Black, not Hispanic2,4573.8%
Asian, not Hispanic6,2279.6%
American Indian / Alaska Native, not Hispanic620.1%
Native Hawaiian / Pacific Islander, not Hispanic720.1%
Some other race, not Hispanic2070.3%
Two or more races, not Hispanic2,8824.5%

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
59,388
Citizen Voting Age Population (CVAP)
52,377

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic56,36994.9%
Hispanic3,0225.1%
White48,87682.3%
Black2,1323.6%
Asian3,2445.5%
American Indian / Alaska Native600.1%
Native Hawaiian / Pacific Islander730.1%
Two or More Races1880.3%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic50,07995.6%
Hispanic2,2914.4%
White44,10784.2%
Black1,9173.7%
Asian3,6557.0%
American Indian / Alaska Native1950.4%
Native Hawaiian / Pacific Islander700.1%
Two or More Races1370.3%

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