F
- Richard Fancy, actor, General Hospital, The District, Seinfeld
- Dennis Farina, actor, former Chicago police officer, Law & Order, Crime Story, Saving Private Ryan
- Louis Farrakhan, Nation of Islam leader
- James T. Farrell, author
- Enrico Fermi (1901–1954), nuclear physicist and Nobel Prize in Physics winner
- Lupe Fiasco, Rapper, musician
- Carl Fick, filmmaker, novelist
- Eugene Field, author
- Marshall Field, businessman, department store founder and philanthropist
- Marshall Field III, Banker, publisher and philanthropist
- Bill Fischer, offensive lineman for the Chicago Cardinals and College Football Hall of Famer
- Crista Flanagan, comedic actress, MADtv
- John Flynn, film director, screenwriter
- Neil Flynn, actor, Scrubs, The Middle
- Dan Fogelberg, folk/rock musician and composer
- Harrison Ford, actor, the Indiana Jones films, the original Star Wars trilogy
- Thomas Ford, politician (Democrat) and Illinois Governor
- Dennis Franz, actor, NYPD Blue, Hill Street Blues, Die Hard 2
- Jonathan Fraser, actor
- Jason Frasor, relief pitcher for the Chicago White Sox
- John T. Frederick, literary scholar, critic and professor
- Kathleen Freeman, actress
- Betty Friedan, writer, activist, feminist, author of The Feminine Mystique
- William Friedkin, director, The Exorcist
- Francis Fukuyama, philosopher, political economist, author
- R. Buckminster Fuller, scientist, architect, inventor and author
Read more about this topic: List Of People From Illinois