Iowa State Senate seat · lines in effect since 2022
Iowa Senate District 28
A district of about 63,000 people, 23% of adults with a bachelor's degree. It votes R+37.8 relative to the nation for president.
2024 election
Nov 5, 2024- Dennis Guth (R) · won69.4%
- Cynthia Oppedal Paschen (D)30.5%
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 12:13 PM ET
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 election for this seat
16 races since 1968. District numbers are redrawn after each census: each group is one set of lines.
| Year | Winner | Runner-up | Won by |
|---|---|---|---|
| Lines first used in 2022 | |||
| 2024 | Dennis Guth (R) | Cynthia Oppedal Paschen (D) | 38.9 |
| Lines first used in 2012 | |||
| 2020 | Mike Klimesh (R) | Matt Tapscott (D) | 24.9 |
| 2016 | Michael Breitbach (R) | Jan Heikes (D) | 22.3 |
| 2012 | Michael Breitbach (R) | John Beard (D) | 0.1 |
| Lines first used in 2002 | |||
| 2008 | James Seymour (R) | — | Unopposed |
| 2004 | James Seymour (R) | — | Unopposed |
| 2002 | James Seymour (R) | Lenee Sinnott (D) | 5.6 |
| Lines first used in 1992 | |||
| 2000 | Andy McKean (R) | Gary Hart (D) | 14.2 |
| 1996 | Andy McKean (R) | — | Unopposed |
| 1992 | Andy McKean (R) | Shawn Gallagher (D) | 23.5 |
| Lines first used in 1982 | |||
| 1988 | Richard F. Drake (R) | — | Unopposed |
| 1984 | Richard F. Drake (R) | — | Unopposed |
| Lines first used in 1972 | |||
| 1980 | C. W. Hutchins (D) | George Opperman (R) | 11.7 |
| 1976 | C. W. Hutchins (D) | William R. Ferguson (R) | 10.4 |
| 1972 | Karl Nolin (D) | R. Dean Arbuckle (R) | 8.8 |
| Lines first used in 1962 | |||
| 1968 | R. Dean Arbuckle (R) | George E. Uthe (D) | 11.2 |
Won by: the winner's lead over the runner-up, in points of the vote. Source: 99chambers results archive (MEDSL, Klarner, state election offices)
Districts that overlap District 28
The state's districts in other chambers that share residents with this one, and the share of District 28's area in each.
- U.S. House
- IA-4 100%
Every race on these lines
Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.
| 2024 | |
|---|---|
| President | R+42.7 |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated Nov 8, 2026, 7:01 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 28.
Lower than 69% of seats.
Higher than 69% of seats.
Higher than 86% of seats.
Lower than 98% of seats.
Lower than 63% of seats.
Less dense than 92% 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.
District 622% college gradsR+42.7Not up in 2026District 13
IowaR+39.4Held RDistrict 48
22% college gradsR+26.9Not up in 2026District 7
25% college gradsR+40.6Held R
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