Iowa's 3rd Congressional District (IA-3)
Last updated · 5 sources
Zach Nunn, a Republican, has represented the district since 2023.
The district includes all or part of 21 counties.
According to the Census Bureau's 2020–2024 American Community Survey 5-year estimates, the district has a population of 816,359, a median household income of $80,844, and a median age of 37.3. Of residents 25 and older, 36.7% hold a bachelor's degree or higher.
Representative

2026 election
Nunn has filed with the FEC to run for this seat in 2026. 3 candidates for the seat have reported receipts to the FEC.
3 candidates have reported raising money for the 2026 IA-3 race to the FEC.
Election Day: Tuesday, November 3, 2026
| Candidate | Party | Raised | Cash on hand | Through |
|---|---|---|---|---|
| Sarah Trone Garriott | Democratic | $5,293,773 | $3,859,683 | Jun 30 |
| Zach Nunn (incumbent) | Republican | $4,869,249 | $3,568,369 | Jun 30 |
| Jennifer Konfrst | Democratic | $607,944 | $0 | Sep 30 |
Includes primary candidates; FEC filings do not record primary results. FEC race page
District profile
- Population
- 816,359
- Median household income
- $80,844
- Median age
- 37.3
- Bachelor's degree or higher
- 36.7%
Census Bureau, 2020–2024 American Community Survey 5-year estimates
Iowa senators
Chuck GrassleyU.S. Senator for Iowa · Republican
Joni ErnstU.S. Senator for Iowa · Republican
Neighboring districts
Sources
- District boundaries (Census Bureau cartographic boundary file, 119th Congress) · retrieved Oct 2, 2026
- Counties by district (Census Bureau relationship file) · retrieved Oct 2, 2026
- District profile (Census Bureau, 2020–2024 American Community Survey 5-year estimates) · retrieved Oct 2, 2026
- congress-legislators (member data, CC0) · retrieved Oct 2, 2026
- Candidates and totals (Federal Election Commission) · retrieved Oct 2, 2026