Chicago Tribune

The Chicago Tribune is a daily newspaper based in Chicago, Illinois, United States, owned by Tribune Publishing. Founded in 1847, and formerly self-styled as the "World's Greatest Newspaper" (a slogan for which WGN radio and television are named), it remains the most-read daily newspaper of the Chicago metropolitan area and the Great Lakes region. It had the 6th highest circulation for American newspapers in 2017.

In the 1850s, under Joseph Medill, the Chicago Tribune became closely associated with Illinois' favorite son, Abraham Lincoln, and with the Republican Party. In the 20th century under Medill's grandson, Robert R. McCormick, it achieved a reputation as a crusading paper with a decidedly American conservative anti-New Deal outlook, and its writing reached other markets through family and corporate relationships at the New York Daily News and the Washington Times-Herald. The 1960s saw its corporate parent owner, Tribune Company, reach into new markets. In 2008, for the first time in its over century-and-a-half history, its editorial page endorsed a Democrat, Illinoisan Barack Obama, for U.S. president.

Originally published solely as a broadsheet, on January 13, 2009, the Tribune announced it would continue publishing as a broadsheet for home delivery, but would publish in tabloid format for newsstand, news box, and commuter station sales. This change, however, proved to be unpopular with readers and in August 2011, the Tribune discontinued the tabloid edition, returning to its established broadsheet format through all distribution channels. In December 2019, Alden Global Capital, a New York City-based hedge fund, acquired a 32% stake in shares of Tribune Publishing Company.

The Tribune 's masthead displays the American flag, in reference to the paper's former motto, "An American Paper for Americans". The motto is no longer displayed on the masthead, where it was placed below the flag.