The 2018 Illinois Attorney General election took place on November 6, 2018, to elect the Attorney General of Illinois. Incumbent Democratic Attorney General Lisa Madigan, who had served since 2003, did not seek re-election to a fifth term. Democrat Kwame Raoul won the election with 55 percent of the vote, while Republican Erika Harold took 43 percent of the vote.

Lisa Murray Madigan is an American lawyer and politician. A member of the Democratic Party, she served as Attorney General of the U.S. state of Illinois from 2003 to 2019, being the first woman to hold that position. She is the adopted daughter of Michael Madigan, who served as Speaker of the Illinois House of Representatives from 1983 to 1995 and from 1997 to 2021.