C.D. Peacock, originally established as The House of Peacock, is a Chicago-based retail jewelry store founded in 1837 by Elijah Peacock.^[1] The company is Chicago's oldest existing retailer.^[2]

The company survived the Great Chicago Fire, despite its location in the middle of the city, as all of its merchandise was kept in a fireproof safe.^[3] In 1889, Charles Daniel Peacock Sr. assumed control of the business and changed the name to the current C.D. Peacock.^[3] They issued their first retail catalog in 1893, which coincided with the World's Columbian Exposition.^[1] Later, company president Walter C. Peacock became an important figure in Chicago and Illinois sporting circles.

The Peacock family sold the company to Dayton-Hudson in 1969.^[2] During the 1992 American recession, the company encountered financial difficulty, entered bankruptcy and was sold to Gordon Brothers, but ultimately survived in a greatly reduced form. As of 1993, C.D. Peacock is owned by Seymour Holtzman, Chairman of Destination XL Group, with three Metro-Chicago locations.^[3][4] As of 2023 C. D. Peacock still belongs to a corporation controlled by the Holtzman family.

The location in The Palmer House Hilton is known for its 3 openwork brass Art Nouveau "peacock doors" designed by Louis Comfort Tiffany.^[5][6][7] (They are unrelated to The Peacock Room.)