Beginnings regalia on display at the
Field Museum of Natural History|leftIn the mid-18th century, the area was inhabited by the
Potawatomi, an indigenous tribe who had succeeded the
Miami,
Sauk and
Meskwaki peoples in this region. The first known permanent settler in Chicago was a trader,
Jean Baptiste Point du Sable. Du Sable was of
African descent, perhaps born in the
French colony of
Saint-Domingue (Haiti), and he established the settlement in the 1780s. He is commonly known as the "Founder of Chicago". In 1795, following the victory of the new United States in the
Northwest Indian War, an area that was to be part of Chicago was turned over to the U.S. for a military post by native tribes in accordance with the
Treaty of Greenville. In 1803, the
U.S. Army constructed
Fort Dearborn, which was destroyed during the
War of 1812 in the
Battle of Fort Dearborn by the Potawatomi before being later rebuilt. After the War of 1812, the
Odawa,
Ojibwe, and Potawatomi tribes ceded additional land to the United States in the 1816
Treaty of St. Louis. The Potawatomi were forcibly removed from their land after the
1833 Treaty of Chicago and sent west of the
Mississippi River as part of the federal policy of
Indian removal.
19th century On August 12, 1833, the Town of Chicago was organized with a population of about 200. and for several decades was the world's fastest-growing city. As the site of the
Chicago Portage, the city became an important transportation hub between the eastern and western United States. Chicago's first railway,
Galena and Chicago Union Railroad, and the
Illinois and Michigan Canal opened in 1848. The canal allowed
steamboats and
sailing ships on the
Great Lakes to connect to the Mississippi River. A flourishing economy brought residents from rural communities and
immigrants from abroad. Manufacturing and retail and finance sectors became dominant, influencing the
American economy. The
Chicago Board of Trade (established 1848) listed the first-ever standardized "exchange-traded" forward contracts, which were called
futures contracts. In the 1850s, Chicago gained national political prominence as the home of Senator
Stephen Douglas, the champion of the
Kansas–Nebraska Act and the "popular sovereignty" approach to the issue of the spread of slavery. These issues also helped propel another Illinoisan,
Abraham Lincoln, to the national stage. Lincoln was nominated in Chicago for U.S. president at the
1860 Republican National Convention, which was held in a purpose-built auditorium called the
Wigwam. He defeated Douglas in the general election, and this set the stage for the
American Civil War. attributed to
Alexander Hesler of the Cook County Court House and City Hall. Believed to be the oldest surviving photograph taken in Chicago. To accommodate
rapid population growth and demand for better sanitation, the city improved its infrastructure. In February 1856, Chicago's Common Council approved
Chesbrough's plan to build the United States' first comprehensive sewerage system. The project
raised much of central Chicago to a new grade with the use of
jackscrews for raising buildings. While elevating Chicago, and at first improving the city's health, the untreated sewage and industrial waste now flowed into the
Chicago River, and subsequently into
Lake Michigan, polluting the city's primary freshwater source. The city responded by tunneling out into Lake Michigan to newly built
water cribs. In 1900, the problem of sewage contamination was largely resolved when the city completed a major engineering feat. It reversed the flow of the Chicago River so that the water flowed away from Lake Michigan rather than into it. This project began with the construction and improvement of the Illinois and Michigan Canal, and was completed with the
Chicago Sanitary and Ship Canal that connects to the
Illinois River, which flows into the Mississippi River. On October 8, 1871, the
Great Chicago Fire destroyed an area about long and wide, a large section of the city at the time. At least 300 people were killed and over 100,000 were left homeless from the fire. However, much of the city, including
railroads and
stockyards, survived intact, and from the ruins of the previous wooden structures arose more modern constructions of steel and stone. These set a precedent for worldwide construction. During its rebuilding period, Chicago constructed the world's
first skyscraper in 1885, using
steel-skeleton construction. The city grew significantly in size and population by incorporating many neighboring townships between 1851 and 1920, with the largest annexation happening in 1889, with five townships joining the city, including the
Hyde Park Township, which now comprises most of the
South Side of Chicago and the far southeast of Chicago, and the
Jefferson Township, which now makes up most of
Chicago's Northwest Side. The desire to join the city was driven by municipal services that the city could provide its residents. Chicago's flourishing economy attracted huge numbers of new immigrants from
Europe and migrants from the
Eastern United States. Of the total population in 1900, more than 77% were either foreign-born or born in the United States of foreign parentage.
Germans,
Irish,
Poles,
Swedes, and
Czechs made up nearly two-thirds of the foreign-born population (by 1900, whites were 98.1% of the city's population).
Labor conflicts followed the industrial boom and the rapid expansion of the labor pool during the
Gilded Age, including the
Haymarket affair on May 4, 1886, and in 1894 the
Pullman Strike.
Anarchist and socialist groups played prominent roles in creating very large and highly organized labor actions. Concern for social problems among Chicago's immigrant poor led
Jane Addams and
Ellen Gates Starr to found
Hull House in 1889. Programs that were developed there became a model for the new field of
social work. (1885)|left During the 1870s and 1880s, Chicago attained national stature as the leader in the movement to improve public health. City laws and later, state laws that upgraded standards for the medical profession and fought urban epidemics of
cholera,
smallpox, and
yellow fever were both passed and enforced. These laws became templates for public health reform in other cities and states. The city established many large, well-landscaped
municipal parks, which also included public sanitation facilities. The chief advocate for improving public health in Chicago was
John H. Rauch, M.D. Rauch established a plan for Chicago's park system in 1866. He created
Lincoln Park by closing a cemetery filled with shallow graves, and in 1867, in response to an outbreak of cholera he helped establish a new Chicago Board of Health. Ten years later, he became the secretary and then the president of the first Illinois State Board of Health, which carried out most of its activities in Chicago. In the 1800s, Chicago became the nation's railroad hub, and by 1910 over 20 railroads operated passenger service out of six different downtown terminals. In 1883, Chicago's railway managers needed a general time convention, so they developed the standardized system of North American
time zones. This system for telling time spread throughout the continent. in 1893 In 1893, Chicago hosted the
World's Columbian Exposition on former marshland at the present location of
Jackson Park. The Exposition drew 27.5 million visitors, and is considered the most influential
world's fair in history. The city's municipal device, a Y within a circle, was the result of a contest run by the
Chicago Tribune in 1892, in anticipation of the Columbian Exposition. The
University of Chicago, formerly at another location, moved to the same South Side location in 1892. The term "midway" for a fair or carnival referred originally to the
Midway Plaisance, a strip of park land that still runs through the University of Chicago campus and connects the
Washington and Jackson Parks.
20th and 21st centuries 1900 to 1939 During
World War I and the 1920s there was a major expansion in industry. The availability of jobs attracted African Americans from the
Southern United States. Between 1910 and 1930, the African American population of Chicago increased dramatically, from 44,103 to 233,903. This
Great Migration had an immense cultural impact, called the
Chicago Black Renaissance, part of the
New Negro Movement, in art, literature, and music. Continuing racial tensions and violence in the city, such as the
Chicago race riot of 1919, also occurred. The ratification of the 18th amendment to the Constitution in 1919 made the production and sale (including exportation) of alcoholic beverages illegal in the United States. This ushered in the beginning of what is known as the gangster era, a time that roughly spans from 1919 until 1933 when
Prohibition was repealed. The 1920s saw
gangsters, including
Al Capone,
Dion O'Banion,
Bugs Moran and
Tony Accardo battle law enforcement and each other on the streets of Chicago during the Prohibition era. Chicago was the location of the infamous
St. Valentine's Day Massacre in 1929, when Al Capone sent men to gun down members of a rival gang, North Side, led by Bugs Moran, leaving seven rival members dead. From 1920 to 1921,
the city was affected by a series of tenant rent strikes, which led to the formation of the Chicago Tenants Protective association, passage of the Kessenger tenant laws, and of a heat ordinance that legally required flats to be kept above 68 °F during winter months by landlords. Chicago was the first American city to have a homosexual-rights organization. The organization, formed in 1924, was called the
Society for Human Rights. It produced the first American publication for homosexuals,
Friendship and Freedom. Police and political pressure caused the organization to disband. (1931) The Great Depression brought unprecedented suffering to Chicago, in no small part due to the city's heavy reliance on heavy industry. Notably, industrial areas on the south side and neighborhoods lining both branches of the Chicago River were devastated; by 1933 over 50% of industrial jobs in the city had been lost, and unemployment rates amongst blacks and Latinos in the city were over 40%. The Republican political machine in Chicago was utterly destroyed by the economic crisis, and every mayor since 1931 has been a
Democrat. Chicago was also a hotbed of labor activism, with
Unemployed Councils contributing heavily in the early depression to create solidarity for the poor and demand relief; these organizations were created by socialist and communist groups. By 1935, the
Workers Alliance of America began organizing the poor, workers, the unemployed. In the spring of 1937 Republic Steel Works witnessed the
Memorial Day massacre of 1937 in the neighborhood of East Side. In 1933, Chicago Mayor
Anton Cermak was fatally wounded in
Miami, Florida, during a
failed assassination attempt on President-elect
Franklin D. Roosevelt by
Giuseppe Zangara. In 1933 and 1934, the city celebrated its centennial by hosting the
Century of Progress International Exposition
World's Fair. The theme of the fair was technological innovation over the century since Chicago's founding.
1940 to 1979 (1967) inspired a new era in urban public art. During
World War II, the city of Chicago alone produced more steel than the United Kingdom every year from 1939 – 1945, and more than
Nazi Germany from 1943 – 1945. outside the
1968 Democratic National Convention The Great Migration, which had been on pause due to the Depression, resumed at an even faster pace in the
second wave, as hundreds of thousands of blacks from the South arrived in the city to work in the steel mills, railroads, and shipping yards. On December 2, 1942, physicist
Enrico Fermi conducted the world's first controlled
nuclear reaction at the University of Chicago as part of the top-secret
Manhattan Project. This led to the creation of the atomic bomb by the United States, which it used in
World War II in 1945. Mayor
Richard J. Daley, a Democrat, was elected in 1955, in the era of
machine politics. In 1956, the city conducted its last major expansion when it annexed the land under O'Hare airport, including a small portion of DuPage County. By the 1960s, white residents in several neighborhoods left the city for the suburban areas – in many American cities, a process known as
white flight – as Blacks continued to move beyond the
Black Belt. While home loan discriminatory
redlining against blacks continued, the real estate industry practiced what became known as
blockbusting, completely changing the racial composition of whole neighborhoods. Structural changes in industry, such as globalization and job outsourcing, caused heavy job losses for lower-skilled workers. At its peak during the 1960s, some 250,000 workers were employed in the steel industry in Chicago, but the steel crisis of the 1970s and 1980s reduced this number to just 28,000 in 2015. In 1966,
Martin Luther King Jr. and
Albert Raby led the
Chicago Freedom Movement, which culminated in agreements between Mayor Richard J. Daley and the movement leaders. Two years later, the city hosted the tumultuous
1968 Democratic National Convention, which featured physical confrontations both inside and outside the convention hall, with anti-war protesters, journalists and bystanders being beaten by police. Major construction projects, including the Sears Tower (now known as the
Willis Tower, which in 1974 became the
world's tallest building),
University of Illinois at Chicago,
McCormick Place, and
O'Hare International Airport, were undertaken during Richard J. Daley's tenure. In 1979,
Jane Byrne, the city's first female mayor, was elected. She was notable for temporarily moving into the crime-ridden
Cabrini-Green housing project and for leading Chicago's school system out of a financial crisis.
1980 to present In 1983,
Harold Washington became the first black mayor of Chicago. Washington's first term in office directed attention to poor and previously neglected minority neighborhoods. He was re‑elected in 1987 but died of a heart attack soon after. Washington was succeeded by 6th ward alderperson
Eugene Sawyer, who was elected by the Chicago City Council and served until a special election.
Richard M. Daley, son of Richard J. Daley, was elected in 1989. His accomplishments included improvements to parks and creating incentives for
sustainable development, as well as closing
Meigs Field in the middle of the night and destroying the runways. After successfully running for re-election five times, and becoming Chicago's longest-serving mayor, Richard M. Daley declined to run for a seventh term. In 1992, a construction accident near the
Kinzie Street Bridge produced a breach connecting the Chicago River to a tunnel below, which was part of an
abandoned freight tunnel system extending throughout the downtown
Loop district. The
tunnels filled with of water, affecting buildings throughout the district and forcing a shutdown of electrical power. The area was shut down for three days and some buildings did not reopen for weeks; losses were estimated at $1.95 billion. Emanuel was sworn in as mayor on May 16, 2011, and won re-election in 2015.
Lori Lightfoot, the city's first African American woman mayor and its first openly LGBTQ mayor, was elected to succeed Emanuel as mayor in 2019. All three city-wide elective offices were held by women (and women of color) for the first time in Chicago history: in addition to Lightfoot, the city clerk was
Anna Valencia and the city treasurer was
Melissa Conyears-Ervin. On May 15, 2023,
Brandon Johnson assumed office as the 57th mayor of Chicago. ==Geography==