Missouri’s 3rd Congressional District

Official photo of Robert F. Onder, Jr.
Robert F. Onder, Jr.
R

U.S. Representative · MO-3

Official website  ·  Bioguide  ·  202-225-2956

Redistricting update: Missouri’s 2025 congressional map is blocked. On September 3, 2026 the Supreme Court of Missouri ruled unanimously that the map cannot be used in the November 2026 election unless voters approve it first, and ordered a statewide vote. The court held that the map drawn after the 2020 census remains in effect for the November 2026 general election. That is the map shown on this page, so these boundaries and ZIP codes are the lines Missouri voters use this November. The state attorney general has said she will appeal to the U.S. Supreme Court. See the redistricting tracker for where each of the 10 states stands.
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REPUBLICAN

Missouri’s 3rd Congressional District is represented by Robert F. Onder, Jr. (R) in the U.S. House of Representatives. The district is one of Missouri’s seats in the 435-member House of Representatives. Each congressional district represents roughly 760,000 people based on the 2020 Census, and district boundaries were most recently redrawn during the redistricting cycle following that census.

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

775,773

Median Household Income

$80,027

Partisan Lean

R+27

2024 presidential margin (Trump vs Harris). Source: The Downballot.

District boundary, 119th Congress. Boundary data: U.S. Census Bureau TIGERweb. Map tiles: OpenStreetMap.

Robert F. Onder, Jr. and Missouri's 3rd Congressional District

Robert F. Onder, Jr., a member of the Republican Party, represents Missouri's 3rd Congressional District and has held the seat since January 3, 2025. 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 Transportation and Infrastructure, House Committee on the Judiciary and House Committee on Education and Workforce.

The current term ends January 3, 2027. The seat is on the ballot on Tuesday, November 3, 2026. Washington office phone: 202-225-2956. Official site: onder.house.gov.

Current Representative

Rep. Robert F. Onder, Jr. (R)

119th Congress • Republican • Representing this district since January 3, 2025

Robert F. Onder, Jr. currently represents Missouri’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

The Federal Election Commission has 4 candidate filings on record for the 2026 race in this district as of September 12, 2026. A filing stays on record after a candidate withdraws or loses a primary, so some names below will not be on the November 3, 2026 ballot.

  • John G Fraser (Republican)
  • Tommy Holstein (Democratic)
  • Bethany Mann (Democratic)
  • Robert Frank Onder Jr. (Republican)

Source: Federal Election Commission filings, refreshed automatically. The FEC lists everyone who has filed to run; it does not show who won a primary. Voters can confirm registration and polling places through their state's secretary of state website.

On the ballot Tuesday, November 3, 2026

This seat is on the ballot on Tuesday, November 3, 2026. All 435 seats in the U.S. House are, because House terms run 2 years. The winner takes office on January 3, 2027.

Polling places in Missouri are open 6 a.m. to 7 p.m., local time. Confirm your registration and polling place on the official federal voter page for Missouri: vote.gov.

What is on the ballot nationally on November 3, 2026

Contact Your Representative

Washington Office

1113 Longworth House Office Building
Washington, DC 20515
Phone: (202) 225-2956

Committee Assignments

About This District

The district spans 16 counties in Missouri, including Callaway, Moniteau, Miller, Crawford, and Cooper, and others. Its largest cities are Columbia (about 126,000), St. Charles (about 70,000), St. Peters (about 58,000), and Wentzville (about 44,000).

Frequently Asked Questions

Who represents Missouri's 3rd Congressional District?

Robert F. Onder, Jr. (R) represents Missouri's 3rd Congressional District in the U.S. House of Representatives.

What political party is Robert F. Onder, Jr. a member of?

Robert F. Onder, Jr. is a member of the Republican Party.

How can I contact Robert F. Onder, Jr.?

You can reach Robert F. Onder, Jr. by phone at 202-225-2956 or through their official website at https://onder.house.gov.

When does Robert F. Onder, Jr.'s current term end?

Robert F. Onder, Jr.'s current term in the U.S. House of Representatives ends on January 3, 2027.

Where is Missouri's 3rd Congressional District?

Missouri's 3rd Congressional District is located in the state of Missouri and is one of the 435 voting congressional districts in the U.S. House of Representatives.

What district does Robert F. Onder, Jr. represent?

Robert F. Onder, Jr. has represented Missouri's 3rd Congressional District since January 3, 2025. The boundary map for the district is on this page.

Where can I see a map of Robert F. Onder, Jr.'s district?

The boundary map for Missouri'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 Robert F. Onder, Jr. on?

Robert F. Onder, Jr. sits on House Committee on Transportation and Infrastructure, House Committee on the Judiciary and House Committee on Education and Workforce. Committee assignments come from the Clerk of the House MemberData file.

Is Robert F. Onder, Jr. still in Congress?

This site shows Robert F. Onder, Jr. holding Missouri'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.

Explore More

View all of Missouri’s congressional districts or use our ZIP code lookup to find your own district.

All Missouri Districts → Find Your District →

Learn more about congressional districts

Nearby Districts in Missouri

See all Missouri congressional districts →

ZIP Codes in Missouri's 3rd Congressional District

This congressional district contains 150 ZIP codes. The most common 10 are shown below; expand the full list to see every ZIP in the district.

79 of these ZIP codes also extend into another Missouri district, so a ZIP code here does not always identify a single representative. Examples include 63012 (also in the 8th), 63014 (also in the 2nd), 63015 (also in the 2nd), 63016 (also in the 8th), 63020 (also in the 8th), 63025 (also in the 2nd), 63026 (also in the 2nd and 8th), 63028 (also in the 8th).

  • 63012
  • 63014
  • 63015
  • 63016
  • 63020
  • 63023
  • 63025
  • 63026
  • 63028
  • 63030
View all 150 ZIP codes in this district
  • 63012
  • 63014
  • 63015
  • 63016
  • 63020
  • 63023
  • 63025
  • 63026
  • 63028
  • 63030
  • 63037
  • 63041
  • 63047
  • 63049
  • 63050
  • 63051
  • 63052
  • 63068
  • 63069
  • 63071
  • 63072
  • 63080
  • 63087
  • 63091
  • 63301
  • 63303
  • 63304
  • 63333
  • 63348
  • 63349
  • 63350
  • 63351
  • 63359
  • 63361
  • 63363
  • 63366
  • 63367
  • 63368
  • 63373
  • 63376
  • 63380
  • 63381
  • 63383
  • 63384
  • 63385
  • 63386
  • 63388
  • 63390
  • 63622
  • 63624
  • 63626
  • 63628
  • 63630
  • 63631
  • 63648
  • 63660
  • 63664
  • 63674
  • 65001
  • 65010
  • 65011
  • 65013
  • 65014
  • 65016
  • 65017
  • 65018
  • 65023
  • 65024
  • 65025
  • 65026
  • 65032
  • 65034
  • 65035
  • 65039
  • 65040
  • 65041
  • 65043
  • 65046
  • 65047
  • 65048
  • 65049
  • 65050
  • 65051
  • 65052
  • 65053
  • 65054
  • 65058
  • 65059
  • 65061
  • 65062
  • 65063
  • 65064
  • 65065
  • 65066
  • 65067
  • 65068
  • 65069
  • 65072
  • 65074
  • 65075
  • 65076
  • 65077
  • 65079
  • 65080
  • 65081
  • 65082
  • 65083
  • 65084
  • 65085
  • 65101
  • 65109
  • 65201
  • 65202
  • 65203
  • 65215
  • 65231
  • 65233
  • 65237
  • 65240
  • 65251
  • 65256
  • 65262
  • 65264
  • 65276
  • 65279
  • 65287
  • 65301
  • 65322
  • 65347
  • 65348
  • 65350
  • 65354
  • 65401
  • 65441
  • 65443
  • 65446
  • 65449
  • 65452
  • 65453
  • 65456
  • 65459
  • 65486
  • 65535
  • 65559
  • 65560
  • 65565
  • 65566
  • 65580
  • 65582
  • 65586

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: Josh Hawley (R), Eric Schmitt (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.

Last updated September 7, 2026.

Data last checked September 7, 2026.

See how this district compares with another using Compare Districts.

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