Cary is a village located in Algonquin Township, McHenry County, Illinois and Cuba Township, Lake County, Illinois, United States. The population was 18,067 as of 2019.
In 1841, William Dennison Cary purchased 82 acres (33 ha) for $1.25 an acre at the location of the current town and built a farm. In 1856, Cary included a train station for the Illinois & Wisconsin Railway. The site was approved and a post office was added with the designation "Cary Station." The community around Cary Station was incorporated in 1893 as Cary, Illinois. The town soon became a winter resort for skiing.
Early farmers saw this new railway as an opportunity. The economy relied heavily on selling produce, mainly pickles, and the farmers utilized the railway to conduct business with more industrialized cities such as St. Louis and Chicago. The success of this enterprise helped transform Cary into the suburban community it is today.
Cary is located at 42°12′47″N 88°14′54″W (42.2129566, -88.2483260).
According to the 2010 census, Cary has a total area of 6.358 square miles (16.47 km2), of which 6.27 square miles (16.24 km2) (or 98.62%) is land and 0.088 square miles (0.23 km2) (or 1.38%) is water.