Jefferson County, Missouri

Jefferson County Executive

2 candidates are tracked for Jefferson County Executive on the November 3, 2026 ballot: Tim Whitney and David Frank. Candidate information follows official Jefferson County election filings; verify with the official election office linked below.

About this race

Open seat: incumbent Dennis Gannon is not seeking re-election. August 4 primary result: Tim Whitney won the Republican nomination with 65.71 percent (16,907 votes) over John Stockton, and David Frank won the Democratic nomination with 50.48 percent (6,902 votes) over Anthony Dwayne Ruble (49.52 percent, 6,770 votes), per the Jefferson County Clerk's official primary results summary.

What this office does

County commissioner. The county board is the county's legislative and, in most states, executive body. Commissioners adopt the county budget and property tax rate, oversee roads, the jail, public health, planning and zoning in unincorporated areas, and appoint or confirm department heads. In counties with an elected county executive or judge, the board's role is mainly the budget and ordinances.

This race. Every voter in Jefferson County votes on this seat.

Missouri › Jefferson County › Jefferson County Executive

Tim Whitney

Republican

Top priorities

Wants an efficient county government that spends taxpayer dollars wisely
Would seek funding for county transportation infrastructure while preserving the county's scenic character
Says data center development proposals should be evaluated case by case with full public information

Per Leader Publications.

Biography

Tim Whitney has served with the Jefferson County Sheriff's Office since 2002 and currently serves as Undersheriff, per his campaign site. He is a graduate of the Jefferson College Law Enforcement Academy and the FBI National Academy, and holds a Master of Public Administration from Webster University, per the same source. He is a lifelong Jefferson County resident raised in House Springs.

Campaign site (opens in a new tab)

David Frank

Democratic

Top priorities

Says voters want more transparency in county government
Wants the county to be less reactionary and do more forethought and self-planning

Per the Leader Publications.

Biography

David Frank is an enterprise transformation and mergers and acquisitions integration executive, per Leader Publications. No campaign website was found as of September 6, 2026.

Next on your ballotJefferson County Council District 1

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Voting info and more

Questions about this race

Who is running for Jefferson County Executive in 2026?

When is the Jefferson County Executive 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 Jefferson 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.

Verify this race

Candidate roster from official Jefferson County and state election office filings, last verified September 27, 2026. Bios and priorities carry their attribution inline.

Cross-check with the official Missouri election office, or see the full Jefferson County sample ballot and your exact ballot by address.

The rest of your Jefferson County ballot

19 tracked races in Jefferson County, Missouri. Landed here from another county's search? Look up your own ballot below.

Also on your ballot

Jefferson County Council District 3 Jefferson County Council District 5 Jefferson County Council District 7 See all 19 Jefferson County races

Candidate profiles

Tim Whitney, full profile David Frank, full profile Official Missouri election office