Iowa State Senate seat · lines in effect since 2022
Iowa Senate District 34
A district of about 66,000 people, 22% of adults with a bachelor's degree. It votes R+30.6 relative to the nation for president.
2024 election
Nov 5, 2024- Dan Zumbach (R) · won66.7%
- Joe Hegland (D)33.2%
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 1970. 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 | Dan Zumbach (R) | Joe Hegland (D) | 33.5 |
| Lines first used in 2012 | |||
| 2020 | Liz Mathis (D) | — | Unopposed |
| 2016 | Liz Mathis (D) | Rene Gadelha (R) | 12.1 |
| 2012 | Liz Mathis (D) | Ryan Flood (R) | 22.5 |
| Lines first used in 2002 | |||
| 2008 | Dick L. Dearden (D) | Scott Strosahl (R) | 29.6 |
| 2004 | Dick L. Dearden (D) | — | Unopposed |
| 2002 | Dick L. Dearden (D) | — | Unopposed |
| Lines first used in 1992 | |||
| 2000 | Matt McCoy (D) | — | Unopposed |
| 1996 | Matt McCoy (D) | Chuck Austin (R) | 37.0 |
| 1992 | Tony Bisignano (D) | — | Unopposed |
| Lines first used in 1982 | |||
| 1988 | John A. Peterson (D) | John C. Rhodes (R) | 16.3 |
| 1984 | John E. Neighbur (D) | Jerry G. Davis (R) | 13.6 |
| Lines first used in 1972 | |||
| 1980 | George R. Kinley (D) | Gary E. Cozad (R) | 36.9 |
| 1976 | George R. Kinley (D) | Kappie Spencer (R) | 45.1 |
| 1972 | George R. Kinley (D) | Joseph S. Kelly (R) | 36.8 |
| Lines first used in 1962 | |||
| 1970 | Eugene M. Hill (D) | Martin O. Oconnor (R) | 5.4 |
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 34
The state's districts in other chambers that share residents with this one, and the share of District 34's area in each.
- U.S. House
- IA-2 100%
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+33.0 |
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 34.
Lower than 82% of seats.
Highest of 50 seats.
Lower than 96% of seats.
Lower than 96% of seats.
Lower than 94% of seats.
Less dense than 76% 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 3325% college gradsR+27.5Held RDistrict 29
26% college gradsR+29.4Held RDistrict 19
25% college gradsR+34.6Held RDistrict 32
23% college gradsR+25.4Not 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