Iowa State Senate District 18

State Legislative District Profile (Upper Chamber)

Overview

District ID
ia-sd-018
State
Iowa
Chamber
Upper chamber (state senate)
District Code
018
Land Area
19.5 sq mi
Water Area
0.72 sq mi

Boundary

Boundary of Iowa State Senate District 18

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Polk County19.49 sq mi100.0%3.4%

Showing all 1 county

Places

PlaceOverlapShare of district landShare of place land
Des Moines city19.49 sq mi100.0%22.1%

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 363,978100.0%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
43,600
Active Voters
35,867 (82.3%)

Party Registration

PartyVotersShare
Democratic22,27251.1%
Republican7,59917.4%
Unaffiliated13,25930.4%
Other parties4701.1%
No party recorded00.0%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202614,661 (33.6%)0 (0.0%)0 (0.0%)
2023–202433,943 (77.9%)4,279 (9.8%)467 (1.1%)
2021–202226,311 (60.3%)8,830 (20.3%)1,849 (4.2%)
2019–202032,884 (75.4%)10,946 (25.1%)1,755 (4.0%)
2017–201825,651 (58.8%)8,881 (20.4%)766 (1.8%)
2015–201625,656 (58.8%)4,284 (9.8%)647 (1.5%)
2013–201418,041 (41.4%)1,460 (3.3%)1,786 (4.1%)
2011–201222,218 (51.0%)1,562 (3.6%)609 (1.4%)

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
63,721 (± 2,237)
Median Age
36.6
Median Household Income
$73,312 (± $3,613)
High School Graduate or Higher (age 25+)
94.2%
Bachelor's Degree or Higher (age 25+)
47.5%

Population by Age

GroupPeopleShare
Under 1812,62619.8%
18 to 6441,21564.7%
65 and over9,88015.5%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)4,8267.6%
White, not Hispanic46,61173.1%
Black, not Hispanic6,42710.1%
Asian, not Hispanic3,1615.0%
American Indian / Alaska Native, not Hispanic240.0%
Native Hawaiian / Pacific Islander, not Hispanic10.0%
Some other race, not Hispanic2310.4%
Two or more races, not Hispanic2,4403.8%

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
60,744
Citizen Voting Age Population (CVAP)
48,500

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic56,88893.7%
Hispanic3,8546.3%
White46,85777.1%
Black5,9609.8%
Asian2,1063.5%
American Indian / Alaska Native230.0%
Native Hawaiian / Pacific Islander30.0%
Two or More Races1630.3%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic46,34995.6%
Hispanic2,1474.4%
White39,70281.9%
Black4,4829.2%
Asian1,9053.9%
American Indian / Alaska Native1400.3%
Native Hawaiian / Pacific Islander10.0%
Two or More Races1290.3%

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