Christine J. Johnson was Treasurer for DeKalb County, Illinois, first elected to the office in 1994 and continuing until her resignation in December 2020. She was the longest-serving treasurer in the county's history. Johnson is also a former Republican member of the Illinois Senate, where she represented the 35th legislative district in Boone, DeKalb, Ogle, LaSalle and Winnebago counties from 2011 to 2013. Johnson was elected to her 7th term as Treasurer in 2018.