Iowa State Senate seat · lines in effect since 2022
Iowa Senate District 48
A district of about 55,000 people, 22% of adults with a bachelor's degree. It votes R+26.9 relative to the nation for president.
2024 election
Nov 5, 2024- Mark Lofgren (R) · won65.7%
- John Dabeet (D)34.2%
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
15 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 | Mark Lofgren (R) | John Dabeet (D) | 31.5 |
| Lines first used in 2012 | |||
| 2020 | Dan Zumbach (R) | Eric Green (D) | 30.3 |
| 2016 | Dan Zumbach (R) | Scott Peterson (D) | 29.7 |
| 2012 | Dan Zumbach (R) | Nate Willems (D) | 1.7 |
| Lines first used in 2002 | |||
| 2008 | Kim Reynolds (R) | Ruth Smith (D) | 9.7 |
| 2004 | Jeff Angelo (R) | Steve Waterman (D) | 7.9 |
| Lines first used in 1992 | |||
| 2000 | Sandra H. Greiner (R) | William E. Kuntz (D) | 40.0 |
| 1996 | H. Kay Hedge (R) | John A. Peterson (D) | 39.8 |
| 1992 | H. Kay Hedge (R) | — | Unopposed |
| Lines first used in 1982 | |||
| 1988 | C. W. Hutchins (D) | Jim Rosmanbakehouse (R) | 40.8 |
| 1984 | C. W. Hutchins (D) | — | Unopposed |
| Lines first used in 1972 | |||
| 1980 | James E. Briles (R) | Dave Schweers (D) | 5.9 |
| 1976 | James E. Briles (R) | Forrest C. Teig (D) | 19.2 |
| 1972 | James E. Briles (R) | Varel Dodge (D) | 39.1 |
| Lines first used in 1962 | |||
| 1968 | Marvin W. Smith (R) | H. Kenneth Nurse (D) | 24.5 |
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 48
The state's districts in other chambers that share residents with this one, and the share of District 48's area in each.
- U.S. House
- IA-1 100%
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+37.7 |
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 48.
Lower than 92% of seats.
Higher than 61% of seats.
Higher than 90% of seats.
Lower than 51% of seats.
Lower than 61% of seats.
Less dense than 63% 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 2823% college gradsR+37.8Not up in 2026District 6
22% college gradsR+42.7Not up in 2026District 13
IowaR+39.4Held RDistrict 24
30% college gradsR+22.0Not 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