what county is des plaines il in
Des Plaines /dáµ»sËpleÉªnz/ is a city in Cook County, Illinois, United States. As of the 2010 census, the city had a population of 58,364. It is a suburb of Chicago and is next to O'Hare International Airport. The Des Plaines River runs through the city, just east of its downtown area. Des Plaines is the home of the first franchised McDonald's opened by Ray Kroc in 1955, which is preserved as a museum on Lee Street, north of downtown.