Districts › Senate
Senate District 18
Every race for this seat since 2018, with campaign money →
Represented by
Sen. Janet Petersen Democrat · Polk
Members elected in November 2026 take office when the 92nd General Assembly convenes on Monday, January 11, 2027. Funnel will show them here once the Legislature publishes the new roster.
Registered voters
37,332 active voters, November 2026. Democrats lead by 14,272.
| November 2026 | November 2025 | June 2022 | |
|---|---|---|---|
| Republican | 6,461 17.3% | 6,588 18.5% | 6,742 18.0% |
| Democratic | 20,733 55.5% | 18,757 52.8% | 21,192 56.5% |
| No party | 9,810 26.3% | 9,855 27.7% | 9,154 24.4% |
| Other parties | 328 0.9% | 348 1.0% | 398 1.1% |
Active registrations from the Secretary of State’s monthly totals (Iowa Data Hub); a Senate district is two House districts. Inactive registrations (about 16.8% of the total) aren’t counted.
Who lives here
- People2.0% of Iowans63,721
- Median household incomeIowa: $75,501$73,312
- Median ageIowa: 39.036.6
- Adults with a bachelor’s degree or moreIowa: 32.1%47.5%
- Below the poverty lineIowa: 11.3%10.7%
- Homes lived in by their ownersIowa: 71.3%54.9%
U.S. Census Bureau, ACS 2024 5-year estimates (via Census Reporter). Survey estimates have margins of error, larger for small groups.
Who has held this seat
Since the 90th General Assembly (2023), the first elected under the district maps drawn in 2021. Earlier districts with this number covered different areas.