Joseph Medill was a Canadian-American newspaper editor, publisher, and Republican Party politician. He was co-owner and managing editor of the Chicago Tribune, and he was Mayor of Chicago from after the Great Chicago Fire of 1871 until 1873.

The Chicago Tribune is an American daily newspaper based in Chicago, Illinois, owned by Tribune Publishing. Founded in 1847, and formerly self-styled as the "World's Greatest Newspaper", it remains the most-read daily newspaper in the Chicago metropolitan area and the Great Lakes region. In 2022, it had the seventh-highest circulation of any newspaper in the United States.