Meijer Inc. is an American supercenter chain that primarily operates throughout the Midwestern United States. Its corporate headquarters are in Walker, Michigan, which is a part of the Grand Rapids metropolitan area. Founded in 1934 as a supermarket chain, Meijer is credited with pioneering the modern supercenter concept in 1962. About half of the company's 259 stores are located in Michigan; the others are in Illinois, Indiana, Kentucky, Ohio, and Wisconsin. The chain is ranked by Forbes as the 14th-largest private company in the United States, and is the country's 21st-largest retailer by revenue as of 2020.