Gemco was an American chain of membership department stores that was owned by San Leandro-based Lucky Stores, a California supermarket company which eventually became part of Albertsons. Gemco operated from 1959 until closing in late 1986. A number of the west coast stores were sold to Target which fueled their entry into California. Gemco had a version called Memco, also owned by Lucky Stores, that operated stores in the Chicago, Illinois, and Washington, D.C., areas.