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Missouri's 3rd Congressional District (MO-3)

Last updated · 6 sources

Bob Onder, a Republican, has represented the district since 2025.

The district includes all or part of 16 counties (5 in part).

According to the Census Bureau's 2020–2024 American Community Survey 5-year estimates, the district has a population of 780,389, a median household income of $81,928, and a median age of 39.4. Of residents 25 and older, 35.5% hold a bachelor's degree or higher.

Representative

Official portrait of Bob Onder, U.S. Representative for Missouri's 3rd District
Bob Onder

U.S. Representative for Missouri's 3rd District · Republican

ProfileSchedule this week

2026 redistricting

Missouri enacted a new map (HB 1 (2025)) on Sep 28, 2025, but it is not in effect for 2026; the 2026 election uses the current districts.

Source · All 2026 redistricting changes

2026 election

Onder has filed with the FEC to run for this seat in 2026. 6 candidates for the seat have reported receipts to the FEC.

6 candidates have reported raising money for the 2026 MO-3 race to the FEC.

Election Day: Tuesday, November 3, 2026

Candidates for MO-3 in 2026 who reported raising money to the FEC
CandidatePartyRaisedCash on handThrough
Bob Onder (incumbent)Republican$950,350$471,459Jul 15
Bob OnderRepublican$950,350$471,459Jul 15
Bethany MannDemocratic$43,339$2,776Jul 15
John G. FraserRepublican$17,196$3,783Jul 15
Tommy HolsteinDemocratic$10,095$2,470Jul 15
Paul WilsonDemocratic$4,162$0Aug 4

Includes primary candidates; FEC filings do not record primary results. FEC race page

District profile

Population
780,389
Median household income
$81,928
Median age
39.4
Bachelor's degree or higher
35.5%

Census Bureau, 2020–2024 American Community Survey 5-year estimates

Missouri senators

Neighboring districts

  • IL-13 · Nikki Budzinski (D)
  • IL-15 · Mary Miller (R)
  • MO-1 · Wesley Bell (D)
  • MO-2 · Ann Wagner (R)
  • MO-4 · Mark Alford (R)
  • MO-6 · Sam Graves (R)
  • MO-8 · Jason Smith (R)

Sources