John Curran

Name: John F. Curran 
Title: Attorney
Illinois State Senator (Senate Minority Leader)
John @ Work

John F. Curran moved to private practice in Oak Brook, IL in 2017 after serving 19 years in the Cook County State's Attorney's Office. He gained significant trial experience as an Assistant State's Attorney in the Criminal Bureau before transferring to the Civil Actions Bureau where he became Chief of the Special Litigation Division, supervising over 45 Assistant State's Attorneys while carrying a significant caseload with an emphasis on civil rights litigation and labor and employment law.

Among other notable cases, he has tried five jury trials in the United States District Court for the Northern District of Illinois, argued two appellate matters in the Seventh Circuit Court of Appeals, and was lead counsel in defending several class action cases and for several staff reductions with both unionized and at-will employees.

John joined Castle Law at the beginning of 2023.

John @ Play

John is an avid sports fan and former Liberty Bowl–winning Illini football player who is now a regular spectator at his four daughters' games and competitions. 

Legal Focus
  • Labor Law
  • Employment Law
  • Zoning Law
  • Municipal Law
  • Juris Doctor, 1998
    • Northern Illinois University, College of Law
  • B.S., 1995
    • University of Illinois
  • Defender of Innocence Award, Illinois Innocence Project

Bar Admissions
  • Illinois State Bar Association 1998

Government & Legal Affiliations
  • Republican Senate Minority, Illinois, 2023–present
  • Republican Senate, 41st Senate District, Illinois, 2017–present
  • Vice-Chairman, DuPage, IL County Board, 2011–2017
  • Board Member, DuPage IL, County Board, 2008–2017
  • Vice-Chairman, DuPage, IL County Board, 2011–2017 
  • Woodridge, Illinois Trustee, 2005
  • Board of Directors, Downers Grove, IL Economic Development Corporation
  • Committeeman, Downers Grove, IL Republican Committee
John's Favorite Fun Facts!
  • Favorite Food – Anything from one of our talented Agri-Producers
  • Favorite Movie – The Natural
  • Favorite Music – Classic Rock
  • Pineapple on Pizza? No