The Ballot Brief
Cook County, Illinois

Cook County Sheriff

IllinoisCook County › Cook County Sheriff

2 candidates are tracked for Cook County Sheriff on the November 3, 2026 ballot: Thomas J. Dart and Brad Sandefur. Candidate information follows official Cook County election filings; verify with the official election office linked below.

On Cook County's November 3, 2026 general election ballot, per the Cook County Clerk's official candidate filing list.

Thomas J. Dart

Democratic · Incumbent

Thomas J. Dart is the sitting Cook County Sheriff, per the county's official rosters. He is the Democratic nominee for reelection on the November 3, 2026 ballot.

Brad Sandefur

Libertarian

Brad Sandefur is a qualified Libertarian candidate for Cook County Sheriff on Cook County's November 3, 2026 ballot, per the Cook County Clerk's official candidate filing list.

Verify this race
Candidate roster from official Cook County Supervisor of Elections filings, last verified 2026-09-01. Bios and priorities carry their attribution inline.
Cross-check with the official Illinois election office, or see the full Cook County sample ballot and your exact ballot by address.