| Founded | 1919 |
|---|---|
| Founded by | Dean O'Banion, Earl "Hymie" Weiss (born Henryk Wojciechowski) |
| Founding location | North Side, Chicago, Illinois, U.S. |
| Years active | 1919–1935 |
| Territory | Various neighborhoods in Chicago, mainly North Chicago |
| Ethnicity | Mainly Irish American, with German American, Polish American, Jewish American, and Italian American members |
| Membership (est.) | Around 30 members |
| Criminal activities | Racketeering, bootlegging, illegal gambling, extortion, robbery, murder |
| Rivals | Chicago Outfit and Genna crime family |
The North Side Gang, also known as the North Side Mob, was a primarily Irish-American criminal organization within Chicago during the Prohibition era from the early 1920s to the mid-1930s. It was the principal rival of the South Side Gang, also known as the Chicago Outfit, the crime syndicate of Italian-Americans Johnny Torrio and Al Capone.