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2026 candidates we're tracking in MO-3
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Bob Onder
Republican
Incumbent
Bob Onder is a physician and attorney, per his campaign site, and is the sitting U.S. Representative for this district. He is on the certified candidate list for the August 4 primary, per the Missouri Secretary of State.
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Bethany E Mann
Democratic
Bethany E Mann is an environmental chemist who works in energy and water infrastructure and helps communities test for contaminants like lead, per her campaign site; she was the district's 2024 Democratic nominee and is running again, per ABC17 coverage of the race. She is on the certified candidate list for the August 4 primary, per the Missouri Secretary of State.
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Jim Higgins
Libertarian
Jim Higgins, of St. Louis, is a Libertarian on the certified candidate list for the August 4 primary in this district, per the Missouri Secretary of State. No campaign website was found as of September 6, 2026.
About this race
Missouri's 3rd Congressional District elects one member of the U.S. House of Representatives to a two-year term. Every House seat in the country is on the ballot in 2026. The Missouri primary is Tuesday, August 4, 2026, and the general election is Tuesday, November 3, 2026.