- Ambrose Burke, priest and college president, Davenport
- Anne Marie Howard, actress, Davenport
- Austin Howard, athlete, Davenport
- Branden Campbell, bassist for the Neon Trees, Davenport
- Bill Fitch, NBA Basketball player/coach, Davenport
- Bix Beiderbecke, jazz musician, Davenport
- Chief Black Hawk
- Ken Berry, singer, dancer, Moline
- Louie Bellson, drummer, Moline
- Cletus Madsen, priest and college president, Davenport
- Carl Meinberg, priest and college President, Davenport
- Dana Davis, actress, Davenport
- Daniel David Palmer, chiropracter, Davenport
- Don Nelson, NBA Basketball player/coach, Rock Island
- Ed Conroy, athlete, Davenport
- Elmer Layden, athlete, Davenport
- Eric Christian Olsen, actor, Bettendorf
- Gail Karp, cantor of the Reform Jewish synagogue, Davenport
- Hazel Keener, actress, Bettendor and Davenport
- Hiram Price, politician, Davenport
- Hynden Walch, actress, Davenport
- George Cram Cook, author, Davenport
- Colonel George Davenport, pioneer, US Army Officer
- Gene Oliver, MLB baseball athlete, Rock Island
- Gerald Francis O'Keefe, priest, Davenport
- Isabel Bloom, artist, Davenport
- Jack Fleck, football athlete, Bettendorf
- James Jones, athlete, Davenport
- James Philbrook, actor, Davenport
- Jim Leach, politician, Davenport
- Jim Skinner, CEO of McDonalds, Davenport
- Joe Frisco, vaudeville performer, Davenport
- John Deere, inventor, Moline
- John Getz, actor, Davenport
- John Flannagan, priest and college president, Davenport
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- John Peters, Professional Baseball player and Historian, Rock Island
- Joseph W. Bettendorf Industrialist, Bettendorf (Gilbert)
- Josh Kroeger, athlete, Davenport
- Justin Diercks, racecar driver, Davenport
- Lara Flynn Boyle, actress, Davenport
- Linnea Quigley, actress and producer, Davenport
- Lisa Bluder, basketball coach
- Louise Carver, actress, Davenport
- Michael Nunn, boxer, Davenport
- Mike Butcher, athlete, Davenport
- Martin Cone, priest and college president, Davenport
- Marvin Mottet, priest, Davenport
- Mary Beth Peil, actress and singer, Davenport
- Matthew Ashford Actor, Davenport
- Nat Pendleton Wrestler and Actor, Davenport
- Oran Pape State Patrol, Davenport
- Pat Angerer Football Athlete, Bettendorf
- Pat Miletich MMA Athlete, Bettendorf
- Perry Lafferty Producer, Davenport
- Roger Craig Athlete, Davenport
- Roger Perry Actor, Davenport
- Ronald Reagan, announcer, actor, U.S. President, Davenport
- Samuel Franklin Cody Aviator, Davenport
- Scott Pose MLB Baseball Athlete, Davenport
- Sebastian Menke Priest and College President, Davenport
- Spike O'Dell former WGN Radio host, East Moline
- Stuart Margolin Actor and Director, Davenport
- Sue Lyon Actress, Davenport
- Susan Glaspell Writer, Davenport
- Suzy Bogguss, Country Singer, Aledo
- Tavian Banks Football Athlete, Bettendorf
- Tim Sylvia MMA Athlete, Bettendorf
- Vincent Hugo Bendix Inventor and Industrialist, Moline
- William P. Bettendorf Industrialist, Bettendorf (Gilbert)
- William F. Buffalo Bill Cody, pioneer, LeClaire
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