Cache is an unincorporated community in Alexander County, Illinois, United States. Cache, sometimes called North Cairo, was laid out on January 20, 1904, for B.M. Cyril, President of City Manufacturing Company. Cache is located near the Mississippi River, west of Mounds. It is served by Illinois Route 3. The Beech Ridge Post Office was moved to Bourland's store, operated by O.R. Bourland, and renamed Cache. It opened on October 15, 1914. Cache once had a post office, which closed on October 5, 2002.