Des Plaines is a city in Cook County, Illinois, United States. Per the 2020 census, the population was 60,675. The city is a suburb of Chicago and is located just north of O'Hare International Airport. It is situated on and is named after the Des Plaines River, which runs through the city just east of its downtown area. History Potawatomi, Ottawa, and Ojibwe (Chippewa) Native American tribes inhabited the Des Plaines River Valley prior to Europeans' arrival. When French explorers and missionaries arrived in the 1600s in what was then the Illinois Country of New France, they named the waterway La Rivière des Plaines (English translation: "Plains River") as they felt that trees on the river resembled European plane trees. The first white settlers came from the eastern United States in 1833, after the 1833 Treaty of Chicago was negotiated, followed by many German immigrants during the 1840s and '50s. In the 1850s, the land in this area was purchased by the Illinois and Wisconsin Land Company along a railroad line planned between Chicago and Janesville, Wisconsin. In 1852, the developers built a steam-powered mill next to the river to cut local trees into railroad ties. Socrates Rand then bought the mill and converted it into a grist mill, which attracted local farmers. The Illinois and Wisconsin Railroad made its first stop in the area in the fall of 1854. In 1857, the Chicago, St. Paul, and Fond du Lac Railroad began running its route, stopping near the mill on the Des Plaines river, where a small business section had grown up. The railroad platted the prospective town of Rand at the site. In 1859, the Chicago and North Western Railway purchased the rail line, giving the train station the name "Des Plaines". In 1869, the Rand subdivision's name was changed to Des Plaines, and the village of Des Plaines was then incorporated. Des Plaines was reincorporated in 1873 and elected a village board the following year. Local brick manufacturer Franklin Whitcomb served as the first Village President. In 1925, village residents voted to convert to a city form of government and annexed the village of Riverview to the south. Subsequent annexations included the Orchard Place area in 1956. The city experienced rapid growth after World War II and with the opening of nearby O'Hare International Airport. Des Plaines was the site of Ray Kroc's first McDonald's franchise, which opened