List of Famous people born in Illinois, United States of America

Audrey Christie was an American actress. She appeared in the films Keeper of the Flame, Deadline – U.S.A., Carousel, Splendor in the Grass, The Unsinkable Molly Brown, Harlow, Frankie and Johnny, The Ballad of Josie, Mame, and Harper Valley PTA. During the 1964–1965 television season, she had a recurring role on the situation comedy The Cara Williams Show.

Warren Burton was an American actor. During the late 1970s and throughout the 1990s, he was seen on several daytime soap operas usually in villainous roles.

Gregory John Chaitin is an Argentine-American mathematician and computer scientist. Beginning in the late 1960s, Chaitin made contributions to algorithmic information theory and metamathematics, in particular a computer-theoretic result equivalent to Gödel's incompleteness theorem. He is considered to be one of the founders of what is today known as algorithmic complexity together with Andrei Kolmogorov and Ray Solomonoff. Along with the works of e.g. Solomonoff, Kolmogorov, Martin-Löf, and Leonid Levin, algorithmic information theory became a foundational part of theoretical computer science, information theory, and mathematical logic. It is a common subject in several computer science curricula. Besides computer scientists, Chaitin's work draws attention of many philosophers and mathematicians to fundamental problems in mathematical creativity and digital philosophy.

Richard Ronald Fancy is an American actor and comedian known for his long recurring role on Seinfeld as publisher Mr. Elliott Lippman, Elaine Benes's first major employer on the series. He appeared on the third and fourth seasons of It's Garry Shandling's Show as network boss Mr. Stravely. He also plays the priest in the 1991 film What About Bob? and was Kevin Arnold's high school principal, Dr. Valenti, in the fourth and fifth seasons of The Wonder Years. He also appeared in Oliver Stone's Nixon (1995) and Primal Force (1999).

James Thomas Kolbe is a former Republican member of the United States House of Representatives for Arizona's 5th congressional district, 1985–2003 and 8th congressional district, 2003–2007.

David Stone Martin, born David Livingstone Martin was an American artist best known for his illustrations on jazz record albums.

George Ellery Hale was an American solar astronomer, best known for his discovery of magnetic fields in sunspots, and as the leader or key figure in the planning or construction of several world-leading telescopes; namely, the 40-inch refracting telescope at Yerkes Observatory, 60-inch Hale reflecting telescope at Mount Wilson Observatory, 100-inch Hooker reflecting telescope at Mount Wilson, and the 200-inch Hale reflecting telescope at Palomar Observatory. He also played a key role in the foundation of the International Union for Cooperation in Solar Research and the National Research Council, and in developing the California Institute of Technology into a leading research university.

James Patterson Lyke, O.F.M. was an African-American prelate of the Catholic Church who served as Archbishop of Atlanta from 1991 to 1992. He was the second-ever Black archbishop in America.

Glenn Gray Knoblauch, known professionally as Glen Gray, was a jazz saxophonist and leader of the Casa Loma Orchestra.

William John Janklow was an American politician and member of the Republican Party who holds the record for the longest tenure as Governor of South Dakota: sixteen years in office. Janklow had the third-longest gubernatorial tenure in post-Constitutional U.S. history at 5,851 days.