The Cincinnati Enquirer, a daily morning newspaper, is the highest-circulation print publication in Greater Cincinnati (Ohio) and Northern Kentucky. (The Enquirer publishes a Northern Kentucky edition under the title The Kentucky Enquirer with a front section and remade Local section. The front page is remade from the Ohio edition, although it may contain similar elements.) A Gannett Co. Inc. newspaper, The Enquirer had a joint operating agreement with the afternoon daily, The Cincinnati Post, and handled all of the business functions of both newspapers. Gannett Co. Inc. notified E. W. Scripps Company, publisher of The Post, in 2004 that they will not renew the JOA again. The Post ceased publishing on December 31, 2007.

The Enquirer publishes a variety of print and electronic media, including separate editions for Ohio and Kentucky, 17 Community Press weekly newspapers, 10 Community Recorder weekly newspapers, CiN Weekly magazine, Design Magazine, Inspire Magazine, OurTown magazine, the Cincinnati.Com network of Web sites, and free-distribution advertising publications in the employment, automotive, real estate, rental, health care and shopping segments. Cincinnati.Com is The Enquirer's flagship electronic product, and encompasses 50 local and national information and advertising Web products.

The Enquirer was first published April 10, 1841. The Enquirer became one of the first newspapers in the United States to publish a Sunday edition beginning on April 20, 1848. In at least the decade of the 1850s, The Enquirer also published a weekly digest edition for regional farmers. From before the Civil War to 1881, The Enquirer was owned by Washington McLean, a Copperhead whose editorial policies led to the suppression of the paper by the United States government during the Civil War. After the war, McLean pursued an anti-Republican stance. One of his star writers was Lafcadio Hearn, who wrote for the paper from 1872 to 1875. James W. Faulkner started was a newspaperman from the Enquirer who became the political correspondent for the paper covering the Ohio State Legislature and Statehouse from 1887 until his death. The Faulkner Letter was a well-known column often carried in regional newspapers. From 1881 to his death in 1916, it was run by his son, John Roll McLean. Having little faith in his only child, Ned, John Roll McLean put the Enquirer and another paper he owned, The Washington Post, in trust with a Washington, D.C. bank as trustee. Ned successfully broke the trust regarding The Post, an action that led to its bankruptcy and eventual sale to Eugene Meyer in 1933. The Enquirer, however, continued to be held in trust until 1952.