Chicago is considered the mostgang-occupied city in the United States, with 150,000 gang-affiliated residents,[1] representing more than 100 gangs.[2]Gang warfare and retaliation are common in Chicago. Gangs were responsible for 61% of thehomicides in Chicago in 2011.
Though, in 2025, the Cook County Medical Examiner's Office reported a 30% drop in homicides in Chicago from January 1st, through June 30th. The city also saw about a 39% decrease in overall shootings from roughly the first six months of 2024 (1,029) to this year (623), according to data from the Chicago Police Department. Murders were also down 31% YoY.[3]
The first gangs in Chicago were loosely organized groups of European immigrants in the late 1800s.
In 1910,Big Jim Colosimo founded theChicago Outfit on the South Side.
In the early 1950s, immigration to Chicago had picked up considerably, namely to theWest Side and parts of the South Side with many coming fromPuerto Rico. Demographic shifts and conflicts around this time led to the formation of many gangs, and the inception of a broadergang culture in Humboldt Park, and around other parts of the city.
In the 1970s, gang-related crime and violence spiked, particularly with Hispanic-on-Hispanic homicides increasing in the summer of 1971 due toLatin Kings gang election meetings.[4]
In July 2021, federal agents participating inOperation Legend arrested 27Black Disciples gang members associated with drugs and gun violations in theEnglewood neighborhood on the South Side of Chicago.[5]
In the first six months of 2025, Chicago saw a 33% reduction in homicides and a 38% reduction in shootings.[6]
PBS interviewed Jeff Asher, co-founder ofAH Datalytics'Real-time Crime Index. While noting that the cause of the decrease in violent crime is unknown, ("It's literally a billion-dollar question in terms of if you knew the amount of resources and effort that you would put into it would be tremendous"), Asher reported that after COVID, the US had increased spending on social programs: a 90% increase in construction from local and state governments on social and neighborhood centers, a 50% increase in public safety spending construction, and a 20% increase in highway spending from state and local governments.[7] He speculated that these investments in troubled neighborhoods may have helped reduce crime rates, though many of these social programs were subsequently cut by the Trump administration.
Lack of opportunity and economic oppression especially in the form ofredlining by Chicago's city hall and banks has causedworking class citizens to turn to the sale of illicit drugs for income. FormerChicago Police Superintendent,Garry McCarthy, blamed Chicago's gang culture for its high rates of homicide and other violent crime, stating "It's very frustrating to know that it's like 7% of the population causes 80% of the violent crime... The gangs here are traditional gangs that are generational, if you will. The grandfather was a gang member, the father's a gang member, and the kid right now is going to be a gang member".[8]
Most traditional Chicago street gangs, known asnations, fall under two main factions, called thePeople Nation and theFolk Nation. The People Nation has most, if not all, of its gangs under the "Almighty" moniker. The Folk Nation has most of its gangs divided into various sub-factions, the majority of which belong to an alliance calledLatin Folks which are further divided into groups calledFamilies. There are nations that are independent of both the Folk Nation and People Nation, such as the Black Soul Nation.[9][10][11]
Street gangs that are independent of Folks and People but retain similar identifiers and symbolism as well as maintain a hierarchical structure in membership are known aswar crews. They do not identify as nations though they will engage in traditional gang activity and may conflict with nations as well as other crews. Street gangs that do not retain any semblance of traditional nations or war crews are known simply ascliques. Each individual gang is divided intosets which are territories spanning blocks or neighborhoods that may be combined to form supersets or divided further into subsets. Typically, a single set is based at a single intersection of city streets. There are currently over 90 active Chicago street gangs, with over 747 sets that have been identified by law enforcement.[12][13][14]
Chicago-based street gang nations post-establishment of the Folk Nation and People Nation are as follows:[15][16][17]
Independent Nations
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