electionsmcp › races › Iowa State Senate District 18
Iowa State Senate District 18
The current officeholder, the 2024 result, and a precinct-level model you can run yourself — built from how Iowa actually voted.
Model Iowa State Senate District 18 →
Current officeholder
Janet Petersen Democratic
2024 result
Democratic D+100.0
2024 votes cast
25,564
Office
State Senate
Precinct results — 2024 general
21 precincts reported in Iowa State Senate District 18's 2024 general election. The twenty largest:
| Precinct | Winner | Margin | Votes |
|---|---|---|---|
| 19153-DES MOINES 39 | Democratic | D+100.0 | 1,880 |
| 19153-DES MOINES 38 | Democratic | D+100.0 | 1,798 |
| 19153-DES MOINES 34 | Democratic | D+100.0 | 1,640 |
| 19153-DES MOINES 12 | Democratic | D+100.0 | 1,608 |
| 19153-DES MOINES 41 | Democratic | D+100.0 | 1,600 |
| 19153-DES MOINES 13 | Democratic | D+100.0 | 1,545 |
| 19153-DES MOINES 40 | Democratic | D+100.0 | 1,464 |
| 19153-DES MOINES 43 | Democratic | D+100.0 | 1,459 |
| 19153-DES MOINES 44 | Democratic | D+100.0 | 1,388 |
| 19153-DES MOINES 35 | Democratic | D+100.0 | 1,375 |
| 19153-DES MOINES 7 | Democratic | D+100.0 | 1,296 |
| 19153-DES MOINES 58 | Democratic | D+100.0 | 1,244 |
| 19153-DES MOINES 10 | Democratic | D+100.0 | 1,088 |
| 19153-DES MOINES 9 | Democratic | D+100.0 | 1,064 |
| 19153-DES MOINES 36 | Democratic | D+100.0 | 1,030 |
| 19153-DES MOINES 11 | Democratic | D+100.0 | 1,001 |
| 19153-DES MOINES 8 | Democratic | D+100.0 | 886 |
| 19153-DES MOINES 59 | Democratic | D+100.0 | 858 |
| 19153-DES MOINES 42 | Democratic | D+100.0 | 714 |
| 19153-DES MOINES 55 | Democratic | D+100.0 | 492 |
All 21 precincts are modelable — open the race in the simulator and drill to precinct grain.
Find your district
Enter a ZIP code or a district (e.g. NC-4) to find your U.S. House district and who represents it.
Model Iowa State Senate District 18 in five steps
- Set the candidates. Name the contenders for the Iowa State Senate District 18 (or keep the generic Democrat / Republican defaults). The map starts from real 2024 results in every precinct.
- Apply a swing. Move vote share statewide, or by demographic cohort, with a slider. The map and the running tally recompute instantly.
- Model turnout. Mobilize or depress turnout for any group — turnout and persuasion are modeled separately, the way a real campaign thinks about them.
- Drill to precincts. Zoom from the state down to individual precincts and override any of them by hand.
- Roll up & share. Roll the result up to chamber control, then publish a shareable, frozen link to your scenario.
Open Iowa State Senate District 18 in the simulator →
Frequently asked
Who represents Iowa State Senate District 18?
Janet Petersen (Democratic) currently holds this State Senate seat.
What was the 2024 result in Iowa State Senate District 18?
D+100.0 — 25,564 Democratic, 0 Republican, of 25,564 votes cast.
Can I model this race myself?
Yes — open it in the electionsmcp simulator and model vote-share swing and turnout from the real 2024 baseline, down to the precinct, then roll it up to chamber control.