High Quality Content by WIKIPEDIA articles! Fort Sheridan is a residential neighborhood spread among Lake Forest, Highwood, and Highland Park in Lake County, Illinois, United States. It was originally established as a United States Army Post named after Civil War Cavalry General Philip Sheridan, to honor his services to Chicago. When the main fort was officially closed by the Army on 3 May 1993, the majority of the property was sold by the Department of Defense to commercial land developers. Most of the original housing structures were then refurbished and resold as a residential community. Other buildings were given to cultural organizations like Midwest Young Artists, the largest youth music program in the Midwest. Approximately 90 acres of the southern end of the original post were retained by the Army; there the Army now operates the Sheridan Reserve Center complex.