Iowa's 3rd District: 2026 result

Iowa · election of 3 November 2026Incumbent: Zach Nunn (R)Updated November 10 at 10:20 PM EST

Called · unofficial count

Garriott (D) 53.6%, Nunn (R) 46.4%.

Sarah Trone Garriott (Democratic) won Iowa's 3rd District in the 3 November 2026 election, with 53.6% of the vote to Zach Nunn's 46.4%, a margin of 7.3 points (25,718 votes). The seat changes from Republican to Democratic. Count as of November 10 at 10:20 PM EST, not yet certified.

What stands out in IA-3

from the count and past results

Democratic gain: Sarah Trone Garriott defeated the Republican incumbent, Zach Nunn.
Cook Partisan Voting Index for the district, on its 2026 lines: R+2. A Democrat won it.
In 2024 the district went R+3.8 (Nunn 51.8%, Baccam 47.9%); in 2026 it went D+7.3, an 11.1-point swing toward Democrats.
Garriott finished 7.3 points ahead of Nunn, a gap of 25,718 votes.
352,980 votes are counted so far, against 412,905 in 2024.

Iowa's 3rd District: candidates and votes

Called · unofficial count

General election, 3 November 2026 · as of November 10 at 10:20 PM EST

Candidate	Party	Votes	%
Sarah Trone Garriott	Democratic	189,349	53.6
Zach Nunn · incumbent	Republican	163,631	46.4
Total		352,980	100.0

IA-3 in 2024

same district lines

House election, 5 November 2024

Candidate	Party	Votes	%
Zach Nunn	Republican	213,746	51.8
Lanon Baccam	Democratic	197,962	47.9
Write-ins	Other	1,197	0.3
Total		412,905	100.0

Related races

Iowa: every 2026 House district, the delegation before and after
Other districts in Iowa: IA-1, IA-2, IA-4
Iowa Senate race · Josh Turek (D)
Iowa governor's race · Rob Sand (D)
Closest House races: MN-1 (0.1), NC-5 (0.1), NC-3 (0.1), TN-4 (0.2), FL-27 (0.4)
House results 2026: every race

Sources

Votes and candidates: Wikipedia, 2026 United States House of Representatives elections in Iowa (revision 1384970694, November 10 at 10:20 PM EST), which cites the state election office and AP race calls.
Race call and incumbent: Wikipedia, 2026 United States House of Representatives elections (revision 1385103391). A race is shown as called only when that article marks a winner.
2024 comparison: the 2024 House result from Wikipedia's 2024 House election articles; the 2024 presidential vote in the district from the district's own Wikipedia article.
Text and figures from Wikipedia are available under CC BY-SA 4.0. Results are unofficial until the state certifies them; this page updates with the source.