Northbrook is a suburb of Chicago, located at the northern edge of Cook County, Illinois, United States, on the border of Lake County.
When incorporated in 1901, the village was known as Shermerville in honor of Frederick Schermer, who donated the land for its first train station. The village changed its name to Northbrook in 1923 as an effort to improve its public image. The name was chosen because the West Fork of the North Branch of the Chicago River runs through the Village.
Glenbrook North High School, founded in 1952 as Glenbrook High School, is located in Northbrook. The village is also home to the Northbrook Park District, founded in 1927, Northbrook Court shopping mall, the Ed Rudolph Velodrome, the Chicago Curling Club, and the Northbrook Public Library.
Members of the Potawatomi tribe were the earliest recorded residents of the Northbrook area. In 1833 the Potawatomi ceded their Illinois lands and moved to a place near Council Bluffs, Iowa. Afterward, Joel Sterling Sherman and his family bought 159 acres (64 ha) of land in the northwest quarter of Section 10 for $1.25 per acre; as of 2010, Northbrook's downtown is located on this site. A man named Frederick Schermer donated the land used for the first railroad station, named Schermer Station, and later Shermer Station; the community was named Shermerville after him. By the 1870s Shermerville was a farming community.