Missouri › Cass County › Missouri House District 55
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.
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 or questionnaire response 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 or questionnaire response was found as of September 6, 2026.