Glencoe (/ˈɡlɛnˌkoʊ/) is a village in northeastern Cook County, Illinois, United States. As of the 2010 census, the total population was 8,723. Glencoe is located on Chicago's North Shore and is located within the New Trier High School District. Glencoe ranks 1st among the top 10 most successful cities in the US. It is an affluent town, ranked 2nd among the richest towns in Illinois and 12th among the richest towns in US.