Iowa’s 3rd Congressional District is represented by Zachary Nunn (R) in the U.S. House of Representatives. The district is one of Iowa’s seats in the 435-member House of Representatives. After the 2020 Census, the average congressional district had 761,169 people, according to the U.S. Census Bureau, and these district boundaries were drawn during the redistricting cycle that followed.
Congressional representatives serve two-year terms and face election every even-numbered year. The next election for this seat will take place on November 3, 2026.
Population
806,699
Median Household Income
$79,204
Population and income: U.S. Census Bureau, American Community Survey 5-year estimates for 2019 to 2023, for district lines in effect on January 1, 2023.
Partisan Lean
R+4
2024 presidential margin (Trump vs Harris). Source: The Downballot.
District boundary, 119th Congress. Boundary data: U.S. Census Bureau TIGERweb. Map tiles: OpenStreetMap.
Zachary Nunn and Iowa's 3rd Congressional District
Zachary Nunn, a member of the Republican Party, represents Iowa's 3rd Congressional District and has held the seat since January 3, 2023. The boundary map for the district is above and the ZIP codes it covers are listed further down this page.
Committee assignments: House Committee on Agriculture, House Committee on Financial Services and House Select Committee on the Strategic Competition Between the United States and the Chinese Communist Party.
The current term ends January 3, 2027. The seat is on the ballot on Tuesday, November 3, 2026. Washington office phone: 202-225-5476. Official site: nunn.house.gov.
Current Representative
Rep. Zachary Nunn (R)
119th Congress • Republican • Representing this district since January 3, 2023
Zachary Nunn currently represents Iowa’s 3rd Congressional District as a member of the Republican Party in the United States House of Representatives. The representative’s district office helps constituents with federal casework, such as Social Security claims and veterans’ benefits.
2026 Election
On the ballot November 3, 2026
- Zach Nunn, Republican Incumbent
- Sarah Trone Garriott, Democratic
Source: Iowa Secretary of State, general election candidate list, checked September 26, 2026. Write-in candidates are not listed.
Key dates for November 3, 2026
| Register by mail | Monday, October 19 Application must be postmarked by this date. |
|---|---|
| Register online | Monday, October 19 |
| Register in person | Through Election Day, November 3 |
| Same-day registration | After October 19, register when you vote early at the county auditor or at your polling place, with proof of identity and residence. |
| Early in-person voting | October 14 to November 2 In-person absentee voting at county auditor offices ends at 5 p.m. on November 2. |
| Request a mail ballot | Monday, October 19 Request must be received by 5 p.m. on October 19. |
| Return a mail ballot | Must be received by 8 p.m. on November 3. |
| Election Day | Tuesday, November 3, 2026 |
Check your registration with the Iowa voter lookup. Dates come from the Iowa election office and were checked September 26, 2026. States can change deadlines, so confirm with your election office before you act.
Polling places in Iowa are open 7 a.m. to 8 p.m., local time. Confirm your registration and polling place on the official federal voter page for Iowa: vote.gov.
What is on the ballot nationally on November 3, 2026
Contact Your Representative
Washington Office
1410 Longworth House Office Building
Washington, DC 20515
Phone: (202) 225-5476
Online
Committee Assignments
- House Committee on Agriculture
- House Committee on Financial Services
- House Select Committee on the Strategic Competition Between the United States and the Chinese Communist Party
About This District
The district spans 24 counties in Iowa, including Wapello, Union, Adams, Guthrie, and Madison, and others. Its largest cities are Des Moines (about 214,000), West Des Moines (about 69,000), Ankeny (about 68,000), and Urbandale (about 46,000).
Learn more about congressional districts
- What is a congressional district?
- What does a U.S. Representative do?
- What is gerrymandering?
- How congressional redistricting works
Frequently Asked Questions
Who represents Iowa's 3rd Congressional District?
Zachary Nunn (R) represents Iowa's 3rd Congressional District in the U.S. House of Representatives.
What political party is Zachary Nunn a member of?
Zachary Nunn is a member of the Republican Party.
How can I contact Zachary Nunn?
You can reach Zachary Nunn by phone at 202-225-5476 or through their official website at https://nunn.house.gov.
When does Zachary Nunn's current term end?
Zachary Nunn's current term in the U.S. House of Representatives ends on January 3, 2027.
Where is Iowa's 3rd Congressional District?
Iowa's 3rd Congressional District is located in the state of Iowa and is one of the 435 voting congressional districts in the U.S. House of Representatives.
What district does Zachary Nunn represent?
Zachary Nunn has represented Iowa's 3rd Congressional District since January 3, 2023. The boundary map for the district is on this page.
Where can I see a map of Zachary Nunn's district?
The boundary map for Iowa's 3rd Congressional District is on this page. It is drawn from U.S. Census Bureau TIGERweb boundary files for the 119th Congress.
What committees is Zachary Nunn on?
Zachary Nunn sits on House Committee on Agriculture, House Committee on Financial Services and House Select Committee on the Strategic Competition Between the United States and the Chinese Communist Party. Committee assignments come from the Clerk of the House MemberData file.
Is Zachary Nunn still in Congress?
This site shows Zachary Nunn holding Iowa's 3rd Congressional District, checked against the Clerk of the House member list. All 435 House seats are on the ballot on November 3, 2026, so the answer can change with that election.
Nearby Districts in Iowa
ZIP Codes in Iowa's 3rd Congressional District
This congressional district contains 199 ZIP codes. The most common 10 are shown below; expand the full list to see every ZIP in the district.
62 of these ZIP codes also extend into another Iowa district, so a ZIP code here does not always identify a single representative. Examples include 50002 (also in the 4th), 50020 (also in the 4th), 50022 (also in the 4th), 50025 (also in the 4th), 50039 (also in the 4th), 50042 (also in the 4th), 50044 (also in the 1st), 50046 (also in the 4th).
- 50002
- 50003
- 50007
- 50008
- 50009
- 50020
- 50021
- 50022
- 50023
- 50025
View all 199 ZIP codes in this district
- 50002
- 50003
- 50007
- 50008
- 50009
- 50020
- 50021
- 50022
- 50023
- 50025
- 50026
- 50029
- 50032
- 50033
- 50035
- 50038
- 50039
- 50042
- 50044
- 50046
- 50047
- 50048
- 50049
- 50050
- 50052
- 50058
- 50060
- 50061
- 50063
- 50064
- 50065
- 50066
- 50067
- 50068
- 50069
- 50070
- 50072
- 50073
- 50074
- 50076
- 50103
- 50107
- 50108
- 50109
- 50111
- 50115
- 50123
- 50124
- 50128
- 50129
- 50131
- 50133
- 50139
- 50140
- 50144
- 50146
- 50147
- 50149
- 50150
- 50151
- 50155
- 50156
- 50161
- 50164
- 50165
- 50167
- 50168
- 50169
- 50174
- 50210
- 50211
- 50213
- 50216
- 50217
- 50218
- 50220
- 50222
- 50226
- 50228
- 50229
- 50233
- 50235
- 50237
- 50238
- 50240
- 50243
- 50244
- 50250
- 50254
- 50257
- 50261
- 50262
- 50263
- 50264
- 50265
- 50266
- 50272
- 50273
- 50274
- 50275
- 50276
- 50277
- 50309
- 50310
- 50311
- 50312
- 50313
- 50314
- 50315
- 50316
- 50317
- 50319
- 50320
- 50321
- 50322
- 50323
- 50324
- 50325
- 50327
- 50801
- 50830
- 50831
- 50833
- 50835
- 50836
- 50837
- 50839
- 50840
- 50841
- 50842
- 50843
- 50845
- 50846
- 50847
- 50848
- 50849
- 50851
- 50853
- 50854
- 50857
- 50858
- 50859
- 50860
- 50861
- 50862
- 50863
- 50864
- 51453
- 51462
- 51532
- 51533
- 51535
- 51541
- 51544
- 51552
- 51566
- 51573
- 51577
- 51601
- 51630
- 51631
- 51632
- 51636
- 51637
- 51638
- 51645
- 51646
- 51647
- 51651
- 51656
- 52501
- 52530
- 52531
- 52533
- 52536
- 52537
- 52544
- 52548
- 52549
- 52551
- 52552
- 52553
- 52554
- 52555
- 52560
- 52563
- 52566
- 52569
- 52570
- 52571
- 52572
- 52574
- 52581
- 52583
- 52584
- 52588
- 52590
- 52593
- 52594
ZIP-to-district boundaries sourced from the U.S. Census Bureau's 2024-07-30 Block Equivalency File for the 119th Congress. ZCTAs (ZIP Code Tabulation Areas) approximate USPS delivery ZIPs.
U.S. Senators for this state: Chuck Grassley (R), Joni Ernst (R)
Local surveillance camera contracts
Automated license plate reader contracts are approved locally, by city councils and county boards, not by Congress. These places in this district have a contract record documented from public sources:
Records compiled by Who Approved This, an independent public-records project. Approval dates, amounts, and end dates are cited to council agendas, minutes, and signed contracts.
Place list rebuilt from the Who Approved This public export on September 26, 2026.
Last updated September 27, 2026.
Data last checked September 26, 2026.
See how this district compares with another using Compare Districts.