Cook County, Chicago
Chicago is part of Cook County, but they have their own election authority that is run by different individuals.
Executive Director (equivalent to the Clerk in other jurisdictions): Charles Holiday, Jr.
Assistant Executive Director: Sandra Aspera
Commissioner: Jonathan Swain
Commissioner/Secretary: William Kresse
Chair: Marisel Hernandez
General Counsel: Adam Lasker
Cook County, Suburbs
For election purposes, it's only the suburban areas of Cook County that are controlled by the Cook County Clerk. See above for information about Chicago elections.
Cook County Clerk: Karen Yarborough
Champaign County Clerk: Aaron Ammons