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

Ronald Alan Masak is an American actor. He began as a stage performer, and much of his work was in theater until he transitioned to film and television, where he became a familiar character actor.

Jonathan Tweet is an American game designer from Rock Island, Illinois who has been involved in the development of the role-playing games Ars Magica, Everway, Over the Edge, Talislanta, the third edition of Dungeons & Dragons and 13th Age, and the collectible miniatures game Dreamblade. In 2015 Tweet released Grandmother Fish, a full-color, full-sized book about evolution aimed at preschoolers. In 2018 Tweet released Clades and Clades Prehistoric, two card games for children and adults which demonstrate the concept of a clade.

Phil Harvey is an American entrepreneur, philanthropist and libertarian who has set up large-scale programs that deliver subsidized contraceptives in poor countries. Harvey is the founder and former president of DKT International, the Washington, D.C.-based charity that implements family planning and HIV/AIDS prevention programs in 57 countries across Africa, Asia and Latin America. He is the chief sponsor of the DKT Liberty Project which raises awareness about freedom of speech issues in the U.S. Harvey is also the president of Adam & Eve, the North Carolina–based company that sells sex toys, adult films and condoms. Consequently, he has been called "one of the most influential figures in the American sex industry today".

Rex Everhart was an American film and theatre actor.

Michael K. Colyar is an American actor, comedian, entertainer, voiceover artist, television/radio personality, and author.

Renn Woods is an American film, television and stage actress, vocalist and songwriter. She is best known for her role as Fanta in Roots, and also for her performance of Aquarius in the film version of Hair (1979).

Hyman Philip Minsky was an American economist, a professor of economics at Washington University in St. Louis, and a distinguished scholar at the Levy Economics Institute of Bard College. His research attempted to provide an understanding and explanation of the characteristics of financial crises, which he attributed to swings in a potentially fragile financial system. Minsky is sometimes described as a post-Keynesian economist because, in the Keynesian tradition, he supported some government intervention in financial markets, opposed some of the financial deregulation policies popular in the 1980s, stressed the importance of the Federal Reserve as a lender of last resort and argued against the over-accumulation of private debt in the financial markets.

Jules Furthman was an American magazine and newspaper writer before working as a screenwriter.

Timothy Richard Goebel is an American former competitive figure skater. He is the 2002 Olympic bronze medalist. He was the first person to land a quadruple salchow jump in competition and the first person to land three quadruple jumps in one program. He landed 76 career quadruple jumps before his retirement in 2006.

Byron Keith was an American actor. He also worked on radio as Clete Lee.