1833History
After signing the 1833 Treaty of Chicago, the Potawatomi ceded their Illinois lands and moved to a place near Council Bluffs, Iowa.
1901Government
When incorporated in 1901, the village was known as Shermerville in honor of Frederick Schermer, who donated the land for its first train station.
1909Architecture
Mary's Mission Seminary, the first of its kind which prepared priests and brothers for foreign missions, was opened by the Divine Word Missionaries in 1909.
1919Government
In 1919 the village’s first reading room was established.
1921History
In these early years, Shermerville became notorious for rowdy gatherings at its five saloons; by 1921, therefore, residents believed that the name "Shermerville" had a negative ...
1923Military
The village changed its name to Northbrook in 1923 as an effort to improve its public image.
1927Government
The 17.25-square-mile (44.7 km2) park district, formed in June 1927, serves all of Northbrook and some unincorporated areas within Cook County.
1929Infrastructure
From 1929 to 1973 Northbrook was home to Sky Harbor Airport (formerly, IATA: OBK).
1947History
=== Area codes ===
From 1947 until 1988, Northbrook used a single area code, 312.
1950History
Between 1950 and 1980, the town's population rose from 3,319 to 30,735.
1952Architecture
The Northbrook Public Library first opened in 1952.
1953Government
Glenbrook North High School, founded in 1953 as Glenbrook High School, is located in Northbrook.
1959Sports
Meg Waite Clayton (born 1959), novelist
Chris Collins (born 1974), basketball head coach, Northwestern
J.
1962Education
Hughes and his family moved to Northbrook in 1962, and Hughes attended Glenbrook North High School.
1969Architecture
The current library opened in 1969, and many renovations have occurred, most notably in the 1990’s when a third floor was added to the building.
1973Government
== Arts and culture ==
Founded in 1973, the Northbrook Historical Society works to preserve Northbrook's heritage and educate people about it.
1980Government
Founded in 1980, the Northbrook Symphony is a nonprofit that plays orchestral music in the town.
1987History
Owing to the suburbanization of the community, the last working farm in Northbrook, the Wayside Farm, was sold and closed in 1987.
1988History
However, in 1988, the 312 area code was made exclusive to Chicago and the 708 area code was introduced.
1989Government
Techny, once a separate community, was annexed by Northbrook in 1989 and predominantly lies south of Voltz Road and stretches south to border Glenview.
1994History
community since 1994.
1996History
Then, in 1996, the 708 area code was split into three: 708, 630, and 847.
2002History
Currently, Northbrook uses the 847 area code as well as the 224 area code which was introduced in 2002.
2008Government
In the 2008 presidential election, Barack Obama received over 60% of Northfield Township's vote, while, likewise, Joe Biden earned more than 66% of votes in 2020.
2011Disaster
Winters are relatively cold and snowy, with blizzards sometimes occurring, as in 2011.
2018History
== Economy ==
Northbrook has a workforce population of 27,058 people with 15,219 who are employed, according to a 2018 estimate from the U.S.
2019Civil Rights
The average winter high from December through March is about 36 °F (2.2 °C), with January and February being the coldest months; a polar vortex occurred in January 2019.
2020History
According to the 2020 US gazetteer files, the village has a total area of 13.30 square miles (34.4 km2; 3,440 ha), of which 13.24 square miles (34.3 km2; 3,430 ha) is land, and ...
2021Economy
In 2021, the company announced it would sell the property.
2022History
The village’s retailers had total sales of $1 billion in 2022 and are mostly concentrated in strip malls inside corridors near major roads including Sanders Road, Skokie Bouleva...
2024History
Marshals ’15 Most Wanted Fugitives’ list until 2024.
2025Government
The most recent board election took place in 2025, with Kathryn Ciesla winning as village president.