major American retail chain with a history of marketing general merchandise primarily through discount and variety stores.

The company was founded by Sebastian S. Kresge (Kresge, S.S.), a traveling hardware salesman, and John G. McCrory, owner of eight general merchandise stores in the eastern United States and one of Kresge's customers. In 1897 the two opened a pair of five-and-ten-cent stores in Memphis, Tennessee, and Detroit, Michigan (McCrory continued managing his McCrory Corporation stores through the 1920s). Kresge ultimately became the sole owner of this venture and by 1907 operated S.S. Kresge stores in eight cities between Chicago and Pittsburgh, Pennsylvania. With Kresge as president (1907–25) and chairman of the board (1913–66), the company expanded steadily. Kresge's at first restricted the price of its merchandise to not more than 10 cents, but inflation triggered by World War I drove the limit to 15 cents and higher.

In 1962, under a program designed by company president Harry B. Cunningham, Kresge's entered the large-scale discount retail market with construction of the first Kmart store outside Detroit. With its success, the company expanded aggressively, erecting an average of 85 discount stores per year over the next two decades throughout the United States and parts of Canada. The corporate name was changed to Kmart in 1977. Kmart was particularly prescient in arranging a retail agreement with Martha Stewart (Stewart, Martha): in 1987 the company hired her to serve as the public face for its entertainment and lifestyle products, and in 1997 Kmart became the exclusive retail store for the Martha Stewart Everyday line of home furnishings.

Kmart's expansion continued through the 20th century, and by 2000 the company operated 2,200 Kmart, Big Kmart, and Super Kmart stores in the United States, Puerto Rico, Guam, and the U.S. Virgin Islands. Increasing competition with the world's largest retailer, Wal-Mart, and other discount stores, however, led Kmart to declare bankruptcy in 2002. Although some of its retail stores were shuttered, Kmart survived both the bankruptcy and the legal difficulties experienced by the representative of its star brand, Martha Stewart. The reorganized Kmart Holding Corporation acquired Sears, Roebuck and Co. (Sears, Roebuck and Company) in 2005 and took the name Sears Holdings Corporation, the corporate entity formed to manage the Kmart and Sears retail brands.