DuPage County, Illinois
Coordinates: 41°50′N 88°05′W / 41.833°N 88.083°W / 41.833; -88.083
DuPage County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 916,924, making it the second-most populous county in Illinois. Its county seat is Wheaton.
Dupage County is one of the collar counties of the Chicago-Naperville-Elgin, IL-IN-WI Metropolitan Statistical Area.
The majority of DuPage County is in the 630 and 331 area codes. However, the areas of the county that are in the city of Chicago are in area code 773, primarily part of O'Hare International Airport.
Farmland and rolling plains cover most of DuPage County, while urban development thrives in some of the eastern parts of the county. Although the agricultural county is known mostly for its prosperous bean farming operations, residents (mostly in Clarendon Hills, Hinsdale, and Oak Brook) include some of the wealthiest people in the Midwest. In 2010, Hinsdale was voted the 2nd wealthiest town in the Midwest by Midwest Living, the first being Fairway, Kansas.