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

Arthur Joseph O'Neill was an American bishop of the Roman Catholic Church. At the time of his death, he was one of oldest American Roman Catholic bishops.

Timothy Joseph Lyne was an American Bishop of the Roman Catholic Church.

Meredith Miller is a Cyclo cross and road cyclist from United States. She was educated at Guilford High School, where she graduated in 1992, and went on to attend the University of Wisconsin–Madison and San Francisco State University, where she earned a B.S. and an M.A. in kinesiology in 1996 and 2002 respectively. Miller competed in track athletics in high school and soccer in both high school and college. After graduating from college she played semi-professional soccer for a team in Madison for one season before the team disbanded, following which she was introduced to cycling by her then boyfriend. She represented her nation at the 2009 UCI Road World Championships and in cyclo cross at the 2010, 2011, 2012 and 2013 UCI Cyclo-cross World Championships.

Douglas Theodore Pinnick, sometimes stylized as dUg Pinnick or simply dUg, is an American musician best known as the bass guitarist, songwriter, and co-lead vocalist for the hard rock and progressive metal band King's X. He has performed on 15 albums with King's X, and recorded four solo albums. Pinnick has also participated in numerous side projects, and has multiple guest appearances to his credit. He is recognized for his unique vocals, and heavily distorted bass tone.

Barbara Pearl Jones is a retired American sprinter. She was part of the 4 × 100 m relay teams that won gold medals at the 1952 and 1960 Olympics and at the 1955 and 1959 Pan American Games. At the 1952 Olympics she became the youngest woman to win an Olympic gold medal in athletics, aged 15 years 123 days. She later became a member of the U.S. Paralympic Games Committee.

Patrick Cassidy "Pat" Finn is an American film and television actor.

Seth Barnes Nicholson was an American astronomer. He worked at the Lick observatory in California, and is known for discovering several moons of Jupiter in the 20th century.

Robert Drivas was an American actor and theatre director.