The following list includes notable people who were born or have lived in Lake Forest, Illinois. For a similar list organized alphabetically by last name, see the category page People from Lake Forest, Illinois.
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- Andrew Bird, singer-songwriter
- Sarah Brackett, actress[1]
- Peach Carr, fashion designer; contestant on season 8 of Project Runway
- Wallace Leroy DeWolf, etcher, painter, art collector, and businessman
- Sylvia Shaw Judson, sculptor and teacher; winner of the Logan Prize in 1929 for her sculpture Little Gardener
- Lisel Mueller, poet; winner of the 1997 Pulitzer Prize for poetry
- Rene Romero Schuler, fine arts painter
- Andrew Watson Armour III, meatpacking magnate
- J. Ogden Armour, meatpacking magnate (Armour and Company)
- Albert Blake Dick, founder of A.B. Dick Company; licensed autographic printing patents from Thomas Edison; mayor of Lake Forest (1928–1931)[citation needed]
- Grace Durand, businesswoman and owner of Crab Tree Dairy Farm[2]
- W. James Farrell, chairman and CEO of Illinois Tool Works[citation needed]
- Charles B. and John V. Farwell, builders of the Texas State capitol building and founders of the XIT Ranch.
- Marshall Field, owner of Marshall Field's (now Macy's)[citation needed]
- Albert Lasker, businessman who played a major role in shaping modern advertising
- Marcus Lemonis, Chairman & CEO Camping World, host of The Profit
- Cyrus H. McCormick, inventor; founder of the McCormick Harvesting Machine Company, which later became International Harvester[citation needed]
- Peter W. Smith, investment banker[3]
- Elizabeth and Richard Uihlein, business people, founders of Uline, conservative donor, and heir[4]
Acting
- Kipleigh Brown, actress[citation needed]
- Kristin Cavallari, actress[citation needed]
- Kyle Chandler, actor
- Jay Chandrasekhar, actor, director
- Charlie Finn, actor
- Jean Harlow, actress
- Lauren Holly, actress[citation needed]
- John Mahoney, actor[citation needed]
- Mr. T, actor, wrestler[5]
- Joan Taylor, actress
- Vince Vaughn, actor
- Richard Widmark, actor
- Robin Williams, actor, comedian
- Kathryn Joosten, actress
- Joseph E. Anderson (1873−1937), Illinois state legislator and most recent Prohibitionist member of the Illinois General Assembly.[6]
- David N. Barkhausen, Illinois state legislator and politician
- Mary Beattie, Illinois state legislator
- Edward J. Brundage, Illinois Attorney General
- Fredrik Herman Gade, mayor of Lake Forest; diplomat from Norway
- Charles B. Farwell, United States Senator from Illinois (1887-1891) and member of the United States House of Representatives (1871-1876, 1881-1883), cofounder of the Onwentsia Club, owner of XIT Ranch
- Susan Garrett, Illinois Senate state senator representing the 29th District
- Noble Brandon Judah, United States Ambassador to Cuba (1927–1929)
- Robert P. Lamont, United States Secretary of Commerce (1929–1932)
- William Mather Lewis, mayor of Lake Forest (1915–1917); president of George Washington and Lafayette Universities
- Thomas J. Moran, Chief Justice of the Illinois Supreme Court
- William Proxmire, U.S. Senator from Wisconsin
- Judy Baar Topinka, Illinois Comptroller and Illinois State Treasurer
- Pete Wilson, 36th Governor of California (1991–1999); United States Senator (1983–1991); 29th mayor of San Diego (1971–1983)
- Corrine Wood, 44th lieutenant governor of Illinois
- Margaret "Peg" Carry, socialite; daughter of Pullman Company president Edward F. Carry; friend of F. Scott Fitzgerald
- Rose Farwell Chatfield-Taylor, socialite, sportswoman, bookbinder, suffragist, cofounder of Onwentsia Club
- Ginevra King, socialite; inspiration for many female characters in F. Scott Fitzgerald's work, including Daisy Buchanan in The Great Gatsby[citation needed]
- Edith Rockefeller McCormick, socialite
- Prince Rostislav Rostislavovich, descendant of the Russian Imperial dynasty the House of Romanov
- McKey Sullivan, fashion model and winner of America's Next Top Model, Cycle 11
- Gabe Carimi (born 1988 in Lake Forest), offensive lineman for the Chicago Bears[8]
- Jim Covert, offensive lineman for the Chicago Bears[citation needed]
- Jay Cutler, quarterback for the Chicago Bears[citation needed]
- Bobby Douglass, quarterback for the Chicago Bears[citation needed]
- Justin Fields, quarterback for the Chicago Bears[citation needed]
- George Halas, head coach of the Chicago Bears[citation needed]
- Cade McNown, quarterback for the Chicago Bears[citation needed]
- Robert Quinn, linebacker for the Chicago Bears [citation needed]
- Lovie Smith, head coach for the Chicago Bears[citation needed]
- Kevin Walter, former wide receiver in the NFL
- Tom Waddle, wide receiver for the Chicago Bears
- James O. Williams,"Big Cat", tackle for Chicago Bears and offensive lineman coach for Lake Forest High School
Swimming
- Matt Grevers, Olympic swimmer; silver medalist (2008), gold medalist (2012)
"Peter W. Smith". Chicago Tribune. legacy.com. May 20, 2017. Retrieved 2 July 2017.