Iowa State Senate seat · lines in effect since 2022
Iowa Senate District 37
A district of about 58,000 people, 39% of adults with a bachelor's degree. It votes D+12.1 relative to the nation for president.
Where it sits among all 50 seats
Every Iowa State Senate seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.
Democratic
Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Every race on these lines
Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.
| 2022 | 2026 | |
|---|---|---|
| Iowa State Senate | D+12.1 | D+24.8 |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: Iowa Secretary of StateUpdated Nov 7, 2026, 3:01 PM ET
Who lives here, compared
Grey bars show the spread of all 50 seats. Small marks are other seats in Iowa. The black marker is District 37.
Higher than 80% of seats.
Lower than 73% of seats.
Lower than 80% of seats.
Higher than 63% of seats.
Higher than 71% of seats.
Denser than 90% of seats.
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET
Seats most like this one
Nearest seats on demographics, density and lean. 1 of the 4 flipped this year.
District 3636% college gradsD+4.7Not up in 2026District 40
34% college gradsD+13.7Not up in 2026District 21
50% college gradsR+1.5Flipped DDistrict 22
48% college gradsD+7.4Not up in 2026
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Who has held it
These lines took effect in 2022.
- Molly Donahue (D)
2023– · Won 2022 by 12.1, 2026 by 24.8
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)