Indiana’s 1st Congressional District is represented by Frank J. Mrvan (D) in the U.S. House of Representatives. The district is one of Indiana’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
755,814
Median Household Income
$71,994
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
EVEN
2024 presidential margin (Trump vs Harris). Source: The Downballot.
District boundary, 119th Congress. Boundary data: U.S. Census Bureau TIGERweb. Map tiles: OpenStreetMap.
Frank J. Mrvan and Indiana's 1st Congressional District
Frank J. Mrvan, a member of the Democratic Party, represents Indiana's 1st Congressional District and has held the seat since January 3, 2021. 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 Appropriations.
The current term ends January 3, 2027. The seat is on the ballot on Tuesday, November 3, 2026. Washington office phone: 202-225-2461. Official site: mrvan.house.gov.
Current Representative
Rep. Frank J. Mrvan (D)
119th Congress • Democrat • Representing this district since January 3, 2021
Frank J. Mrvan currently represents Indiana’s 1st Congressional District as a member of the Democratic 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
- Frank J. Mrvan, Democratic Incumbent
- Barb Regnitz, Republican
Source: Indiana Election Division, 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 5 Application must be postmarked by this date. |
|---|---|
| Register online | Monday, October 5 |
| Register in person | Monday, October 5 |
| Early in-person voting | October 6 to November 2 Early voting ends at noon on November 2. |
| Request a mail ballot | Thursday, October 22 Request by 11:59 p.m. on October 22. Voting by mail requires a qualifying reason. |
| Return a mail ballot | Must be received by 6 p.m. on November 3. |
| Election Day | Tuesday, November 3, 2026 |
Check your registration with the Indiana voter lookup. Dates come from the Indiana election office and were checked September 26, 2026. States can change deadlines, so confirm with your election office before you act.
Polling places in Indiana are open 6 a.m. to 6 p.m., local time. Confirm your registration and polling place on the official federal voter page for Indiana: vote.gov.
What is on the ballot nationally on November 3, 2026
Contact Your Representative
Washington Office
2441 Rayburn House Office Building
Washington, DC 20515
Phone: (202) 225-2461
Online
Committee Assignments
About This District
The district covers all of Porter and Lake counties and parts of LaPorte County in Indiana. Its largest cities are Hammond (about 78,000), Gary (about 69,000), Portage (about 38,000), and Merrillville (about 36,000).
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 Indiana's 1st Congressional District?
Frank J. Mrvan (D) represents Indiana's 1st Congressional District in the U.S. House of Representatives.
What political party is Frank J. Mrvan a member of?
Frank J. Mrvan is a member of the Democratic Party.
How can I contact Frank J. Mrvan?
You can reach Frank J. Mrvan by phone at 202-225-2461 or through their official website at https://mrvan.house.gov.
When does Frank J. Mrvan's current term end?
Frank J. Mrvan's current term in the U.S. House of Representatives ends on January 3, 2027.
Where is Indiana's 1st Congressional District?
Indiana's 1st Congressional District is located in the state of Indiana and is one of the 435 voting congressional districts in the U.S. House of Representatives.
What district does Frank J. Mrvan represent?
Frank J. Mrvan has represented Indiana's 1st Congressional District since January 3, 2021. The boundary map for the district is on this page.
Where can I see a map of Frank J. Mrvan's district?
The boundary map for Indiana's 1st Congressional District is on this page. It is drawn from U.S. Census Bureau TIGERweb boundary files for the 119th Congress.
What committees is Frank J. Mrvan on?
Frank J. Mrvan sits on House Committee on Appropriations. Committee assignments come from the Clerk of the House MemberData file.
Is Frank J. Mrvan still in Congress?
This site shows Frank J. Mrvan holding Indiana's 1st 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 Indiana
ZIP Codes in Indiana's 1st Congressional District
This congressional district contains 49 ZIP codes. The most common 10 are shown below; expand the full list to see every ZIP in the district.
13 of these ZIP codes also extend into another Indiana district, so a ZIP code here does not always identify a single representative. Examples include 46340 (also in the 2nd), 46341 (also in the 4th), 46345 (also in the 2nd), 46346 (also in the 2nd), 46348 (also in the 2nd), 46350 (also in the 2nd), 46371 (also in the 2nd), 46382 (also in the 2nd).
- 46301
- 46302
- 46303
- 46304
- 46307
- 46311
- 46312
- 46319
- 46320
- 46321
View all 49 ZIP codes in this district
- 46301
- 46302
- 46303
- 46304
- 46307
- 46311
- 46312
- 46319
- 46320
- 46321
- 46322
- 46323
- 46324
- 46327
- 46340
- 46341
- 46342
- 46345
- 46346
- 46347
- 46348
- 46350
- 46356
- 46360
- 46368
- 46371
- 46373
- 46375
- 46376
- 46377
- 46382
- 46383
- 46385
- 46390
- 46391
- 46393
- 46394
- 46402
- 46403
- 46404
- 46405
- 46406
- 46407
- 46408
- 46409
- 46410
- 46532
- 46552
- 46574
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: Todd Young (R), Jim Banks (R)
Last updated September 27, 2026.
Data last checked September 26, 2026.
See how this district compares with another using Compare Districts.