Illinois’s 14th Congressional District is represented by Lauren Underwood (D) in the U.S. House of Representatives. The district is one of Illinois’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
759,546
Median Household Income
$93,186
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
D+5
2024 presidential margin (Trump vs Harris). Source: The Downballot.
District boundary, 119th Congress. Boundary data: U.S. Census Bureau TIGERweb. Map tiles: OpenStreetMap.
Lauren Underwood and Illinois's 14th Congressional District
Lauren Underwood, a member of the Democratic Party, represents Illinois's 14th Congressional District and has held the seat since January 3, 2019. 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: 202-225-2976. Official site: underwood.house.gov.
Current Representative
Rep. Lauren Underwood (D)
119th Congress • Democrat • Representing this district since January 3, 2019
Lauren Underwood currently represents Illinois’s 14th 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
- Lauren Underwood, Democratic Incumbent
- James T. "Jim" Marter, Republican
Source: Illinois State Board of Elections, general election candidate list, checked September 26, 2026. Write-in candidates are not listed.
Key dates for November 3, 2026
| Register by mail | Tuesday, October 6 PassedApplication must be postmarked by this date. |
|---|---|
| Register online | Sunday, October 18 |
| Register in person | Through Election Day, November 3 |
| Same-day registration | Grace-period registration and voting run through Election Day at early voting sites and polling places. |
| Early in-person voting | September 24 to November 2 Open nowSites and hours vary by election authority. |
| Request a mail ballot | Thursday, October 29 Mailed requests must be received by October 29. In-person requests are accepted until November 2. |
| Return a mail ballot | Postmarked by November 3 and received by November 17. Ballots delivered by hand or to a drop box are due by 7 p.m. on November 3. |
| Election Day | Tuesday, November 3, 2026 |
Check your registration with the Illinois voter lookup. Dates come from the Illinois election office and were checked September 26, 2026. States can change deadlines, so confirm with your election office before you act.
Polling places in Illinois are open 6 a.m. to 7 p.m., local time. Confirm your registration and polling place on the official federal voter page for Illinois: vote.gov.
What is on the ballot nationally on November 3, 2026
Contact Your Representative
Washington Office
2228 Rayburn House Office Building
Washington, DC 20515
Phone: (202) 225-2976
Online
Committee Assignments
About This District
The district covers all of Kendall County and parts of DeKalb, LaSalle, Putnam, Will, Bureau, and Kane counties in Illinois. Its largest cities are Joliet (about 150,000), Plainfield (about 45,000), DeKalb (about 40,000), and Romeoville (about 40,000).
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 Illinois's 14th Congressional District?
Lauren Underwood (D) represents Illinois's 14th Congressional District in the U.S. House of Representatives.
What political party is Lauren Underwood a member of?
Lauren Underwood is a member of the Democratic Party.
How can I contact Lauren Underwood?
You can reach Lauren Underwood by phone at 202-225-2976 or through their official website at https://underwood.house.gov.
When does Lauren Underwood's current term end?
Lauren Underwood's current term in the U.S. House of Representatives ends on January 3, 2027.
Where is Illinois's 14th Congressional District?
Illinois's 14th Congressional District is located in the state of Illinois and is one of the 435 voting congressional districts in the U.S. House of Representatives.
What district does Lauren Underwood represent?
Lauren Underwood has represented Illinois's 14th Congressional District since January 3, 2019. The boundary map for the district is on this page.
Where can I see a map of Lauren Underwood's district?
The boundary map for Illinois's 14th Congressional District is on this page. It is drawn from U.S. Census Bureau TIGERweb boundary files for the 119th Congress.
What committees is Lauren Underwood on?
Lauren Underwood sits on House Committee on Appropriations. Committee assignments come from the Clerk of the House MemberData file.
Is Lauren Underwood still in Congress?
This site shows Lauren Underwood holding Illinois's 14th 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 Illinois
ZIP Codes in Illinois's 14th Congressional District
This congressional district contains 109 ZIP codes. The most common 10 are shown below; expand the full list to see every ZIP in the district.
84 of these ZIP codes also extend into another Illinois district, so a ZIP code here does not always identify a single representative. Examples include 60111 (also in the 11th and 16th), 60115 (also in the 16th), 60119 (also in the 11th), 60129 (also in the 16th), 60135 (also in the 11th and 16th), 60144 (also in the 11th), 60145 (also in the 11th and 16th), 60146 (also in the 11th and 16th).
- 60111
- 60112
- 60115
- 60119
- 60129
- 60135
- 60144
- 60145
- 60146
- 60150
View all 109 ZIP codes in this district
- 60111
- 60112
- 60115
- 60119
- 60129
- 60135
- 60144
- 60145
- 60146
- 60150
- 60151
- 60178
- 60403
- 60404
- 60410
- 60421
- 60431
- 60432
- 60433
- 60435
- 60436
- 60439
- 60440
- 60441
- 60442
- 60446
- 60447
- 60450
- 60470
- 60481
- 60490
- 60502
- 60503
- 60504
- 60505
- 60506
- 60510
- 60511
- 60512
- 60517
- 60518
- 60520
- 60530
- 60531
- 60536
- 60537
- 60538
- 60541
- 60542
- 60543
- 60544
- 60545
- 60548
- 60549
- 60550
- 60551
- 60552
- 60554
- 60556
- 60557
- 60560
- 60564
- 60565
- 60585
- 60586
- 61068
- 61301
- 61312
- 61315
- 61316
- 61317
- 61320
- 61321
- 61322
- 61323
- 61325
- 61326
- 61327
- 61328
- 61329
- 61330
- 61332
- 61334
- 61335
- 61336
- 61337
- 61340
- 61341
- 61342
- 61348
- 61349
- 61350
- 61354
- 61356
- 61358
- 61359
- 61360
- 61362
- 61363
- 61364
- 61368
- 61370
- 61371
- 61372
- 61373
- 61374
- 61376
- 61377
- 61560
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: Richard J. Durbin (D), Tammy Duckworth (D)
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.