Via Illinois Review
Serving as Senate Republican leadership for the 100th General Assembly are:
- Senator Bill Brady (44th District – Bloomington), Deputy Republican Leader
- Senator Dave Syverson (35th District – Rockford), Assistant Republican Leader
- Senator Sue Rezin (38th District – Peru), Assistant Republican Leader
- Senator Chapin Rose (51st District – Champaign), Assistant Republican Leader
- Senator Jason Barickman (53rd District – Bloomington), Assistant Republican Leader
- Senator Pam Althoff (32nd District – McHenry), Senate Republican Caucus Chair
- Senator Karen McConnaughay (33rd District – St. Charles), Senate Republican Whip