Jeff Diederich
Republican
Biography
Jeff Diederich is the sitting Williamson County Sheriff, per the Williamson County, Illinois government website. No campaign website was found as of September 22, 2026.
Williamson County, Illinois
Williamson County Sheriff
Williamson County, Illinois
Williamson County Sheriff
One candidate is tracked for Williamson County Sheriff on the November 3, 2026 ballot: Jeff Diederich. Candidate information follows official Williamson County election filings; verify with the official election office linked below.
About this race
No Democratic candidate filed. Jeff Diederich won a contested three-way Republican primary on March 17, 2026 with 3,927 votes, ahead of Quinn Laird (2,760) and Stan Diggs (2,543), per the county's certified Enhanced Voting results, and is unopposed on the November 3, 2026 ballot.
What this office does
Sheriff. The sheriff runs the county's law enforcement agency, operates the county jail, provides courthouse security and serves court papers such as warrants, subpoenas and evictions. In many counties the sheriff's office is the primary police force for areas outside city limits. The sheriff hires deputies and manages the office's budget within what the county board approves.
This race. Every voter in Williamson County votes on this seat. One name is on the ballot for this seat.