blog posts Illinois alumnus, longest-serving mayor in state history, has died Apr 24, 2019 10:00 am by WLS-TVIllinois in the News Share on Facebook Tweet Email Bob Butler poses in front of city hall in Marion, Illinois, on Tuesday, Aug. 9, 2005. Images WLS-TV (April 23) – The man who was the longest-serving mayor in Illinois has died at age 92. Bob Butler graduated from the College of Law at Illinois and served as mayor of Marion for 55 years. Share on Facebook Tweet Email