The Ballot Brief
Missouri
Candidate profile

Mary McKenna

Democratic · Missouri · 2026

On the ballot

Presiding CommissionerMissouri · 2026Platte County sample ballot
Top priorities
  • Wants the commission to implement the voter-approved children's mental health sales tax
  • Wants infrastructure and public safety planning to keep pace with the county's rapid growth
  • Emphasizes accountability and transparency in county government

Per The Platte County Landmark Newspaper.

Biography

Mary McKenna has spent her career in the communications industry and has lived in Platte County for more than 40 years, per The Platte County Landmark Newspaper. She is the Democratic candidate for Platte County Presiding Commissioner.

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Voting info and more

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How we source this

Profile facts follow official election office filings and the sources cited in each biography. Roster last verified October 2, 2026. Official sources are the final word on who appears on your ballot.

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