2 candidates are tracked for Missouri House District 55 on the November 3, 2026 ballot: William (Bill) Irwin and Jon Pennell. Candidate information follows official Cass County election filings; verify with the official election office linked below.
William (Bill) Irwin (Republican), Jon Pennell (Democratic) meet on the November 3 ballot; William (Bill) Irwin is the sitting member per the House roster. Missouri has no runoffs; the August 4 primary winner of each party is the nominee, and unopposed nominees still print. The field is the Missouri Secretary of State's certified general election candidate list (certified August 25, 2026). This seat is elected by district; only the district covering your address appears on your ballot.
State legislator. State legislators write and vote on state laws and the state budget, which fund schools, roads, prisons, universities and health programs, and set the rules for local governments and elections. Each member represents one district and serves on committees that shape bills before a floor vote. Terms are two years in most state houses and four in most state senates.
This race. Elected by district: only voters who live in the district see this race on their ballot. The sitting officeholder, William (Bill) Irwin, is on the ballot.
Missouri › Cass County › Missouri House District 55
Republican Incumbent
Bill Irwin retired after 33 years in the United States Navy, including service as a Navy SEAL, and spent 17 years with the Lee's Summit Police Department SWAT team, per his official Missouri House biography. He represents Cass County in House District 55 and was first elected in November 2024, per the same source. No campaign website was found as of September 6, 2026.
Democratic
Jon Pennell previously worked in federal citizenship and immigration services before losing his position when the Department of Government Efficiency eliminated it, per KCUR. He decided to run for the Missouri House District 55 seat, which had gone uncontested by Democrats since 2022. No campaign website was found as of September 6, 2026.
Who is running for Missouri House District 55 in 2026?
2 candidates are tracked for Missouri House District 55 on the November 3, 2026 ballot: William (Bill) Irwin and Jon Pennell. Candidate information follows official Cass County election filings; verify with the official election office linked below.
When is the Missouri House District 55 election in Missouri?
Election Day is Tuesday, November 3, 2026. Registration deadlines, early voting dates and mail ballot rules for Missouri are on the Missouri election hub at theballotbrief.com.
How do I see my exact Cass County ballot?
Enter your ZIP code in the lookup at theballotbrief.com for the statewide and congressional races, or a full street address to add the county, city and district contests for that location.
Candidate roster from official Cass County and state election office filings, last verified September 25, 2026. Bios and priorities carry their attribution inline.
Cross-check with the official Missouri election office, or see the full Cass County sample ballot and your exact ballot by address.
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