One candidate is tracked for Jefferson County Prosecuting Attorney on the November 3, 2026 ballot: Trisha C. Stefanski. Candidate information follows official Jefferson County election filings; verify with the official election office linked below.
No Democrat filed. August 4 primary result: incumbent Trisha C. Stefanski was unopposed in the Republican primary (21,879 votes), per the Jefferson County Clerk's official primary results summary; she is unopposed on the November 3 ballot.
District attorney or prosecutor. The district attorney is the chief prosecutor for the county or judicial district. The office decides which criminal charges to file, negotiates pleas, tries cases and, in many states, advises county government or handles child support and juvenile matters. The office sets local charging and diversion policies within state law.
This race. The sitting officeholder, Trisha C. Stefanski, is on the ballot. One name is on the ballot for this seat.
Missouri › Jefferson County › Jefferson County Prosecuting Attorney
Republican Incumbent
Trisha C. Stefanski is the Jefferson County Prosecuting Attorney, first elected in 2018 as the first woman to hold the office, per the county's official page. She earned her law degree from St. Louis University School of Law. No campaign website was found as of September 6, 2026.
Who is running for Jefferson County Prosecuting Attorney in 2026?
One candidate is tracked for Jefferson County Prosecuting Attorney on the November 3, 2026 ballot: Trisha C. Stefanski. Candidate information follows official Jefferson County election filings; verify with the official election office linked below.
When is the Jefferson County Prosecuting Attorney 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.
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.
19 tracked races in Jefferson County, Missouri. Landed here from another county's search? Look up your own ballot below.