Mary Jane Theis

Mary Jane Theis
Chief Justice of the Illinois Supreme Court
Incumbent
Assumed office October 26, 2022
Preceded by	Anne M. Burke
Justice of the Illinois Supreme Court
Incumbent
Assumed office October 26, 2010
Preceded by	Thomas Fitzgerald
Personal details
Born	Mary Jane Wendt (1949-02-27) February 27, 1949 (age 75) Chicago, Illinois, U.S.
Political party	Democratic
Spouse	John Theis
Relatives	Ken Wendt (father)
Education	Loyola University Chicago (BA) University of San Francisco (JD)

Mary Jane Theis (born February 27, 1949) is a justice of the Illinois Supreme Court for the First Judicial District in Cook County, Illinois. In 2022, she became chief justice after the retirement of then-chief justice Anne M. Burke.