Iowa Senate District 12
State Senate District 12
Covers all of Adair County, Madison County, Decatur County, Wayne County, Lucas County and Clarke County; parts of Union County, Dallas County and Appanoose County.
Who Holds This Seat
Running in 2026
No 2026 candidates are on file for this seat yet.
The District
Includes Osceola, Chariton, De Soto (part), Greenfield, Lamoni, Leon, Macksburg, Seymour, Winterset, Adair (part), Allerton, Bevington (part) and 34 more.
61 precincts · District lines: State senate lines: U.S. Census Bureau (1:500,000 cartographic boundary) · Precinct lines: Iowa Legislative Services Agency, Iowa Precincts (as of the 2022 reprecincting) statewide layer (services.arcgis.com/vPD5PVLI6sfkZ5E4 Iowa_Precincts); U.S. Census Bureau 2020 TIGER/Line VTDs where no official layer; Iowa Legislative Services Agency precincts (2016 file) for the 2020 general
Results in This District
| Contest | First | Second | Margin | Votes | Source |
|---|---|---|---|---|---|
| 2024 President41 precinctsIowa Secretary of StateCertified — Iowa county canvass results… | Donald J. Trump and JD Vance (R)22,232 · 67.6% | Kamala D. Harris and Tim Walz (D)10,143 · 30.8% | R+36.7 | 32,911 | Iowa Secretary of StateCertified — Iowa county canvass results… |
| 2022 U.S. Senate38 precinctsIowa Secretary of StateCertified — Iowa county canvass results… | Chuck Grassley (R)15,671 · 66.8% | Michael Franken (D)7,738 · 33.0% | R+33.8 | 23,465 | Iowa Secretary of StateCertified — Iowa county canvass results… |
| 2022 Governor38 precinctsIowa Secretary of StateCertified — Iowa county canvass results… | Kim Reynolds and Adam Gregg (R)16,449 · 69.5% | Deidre DeJear and Eric Van Lancker (D)6,658 · 28.1% | R+41.4 | 23,676 | Iowa Secretary of StateCertified — Iowa county canvass results… |
| 2020 President33 precinctsIowa Secretary of StateCertified — Iowa county canvass results… | Donald J. Trump and Michael R. Pence (R)18,032 · 67.1% | Joseph R. Biden and Kamala D. Harris (D)8,397 · 31.3% | R+35.9 | 26,865 | Iowa Secretary of StateCertified — Iowa county canvass results… |
| 2020 U.S. Senate33 precinctsIowa Secretary of StateCertified — Iowa county canvass results… | Joni Ernst (R)17,221 · 64.8% | Theresa Greenfield (D)8,502 · 32.0% | R+32.8 | 26,577 | Iowa Secretary of StateCertified — Iowa county canvass results… |
Totals add up the certified precinct results for the precincts inside today's district lines. A precinct split by the district line counts in full, or only in the district holding most of its voters where the linkage assigns it to one, and votes a county reported only countywide (some counties' absentee and early votes) are left out, so totals can differ from an official canvass.
Past Results
State Senator District 12
Iowa General Election 2024-11-05 · Nov 5, 2024| Candidate | Party | Votes | Share |
|---|---|---|---|
| Amy SinclairRepublican | Republican | 23,075 | 70.4% |
| Nicole LoewDemocrat | Democrat | 9,682 | 29.5% |
| Write-in | 43 | 0.1% |
Certified — Iowa county canvass results as published by the Iowa Secretary of State (Clarity ENR final county uploads; county totals reconcile exactly to the State Board of Canvassers canvass summary) · Iowa Secretary of State — Election Night Reporting / Precinct Results by County
State Senator District 12
Iowa General Election 2020-11-03 · Nov 3, 2020| Candidate | Party | Votes | Share |
|---|---|---|---|
| Mark CostelloRepublican | Republican | 20,165 | 69.0% |
| Joseph NorrisDemocrat | Democrat | 8,999 | 30.8% |
| Write-in | 51 | 0.2% |
Certified — Iowa county canvass results as published by the Iowa Secretary of State (Clarity ENR final county uploads; county totals reconcile exactly to the State Board of Canvassers canvass summary) · Iowa Secretary of State — Election Night Reporting / Precinct Results by County