See also: 1924 in organized crime, other events of 1925, 1926 in organized crime and the list of 'years in Organized Crime'.

Events

• Genna Brothers enforcer Joseph Calabriese is killed.
• Karl Bates , a Sheldon Gang hitman, is killed by the Joe Saltis -Frank McErlane Gang.
• John Barry, a member of the Sheldon Gang, is sentenced to two years for violation of the Volstead Act.
• Edward Zion , an associate of Samuzzo Amatuna, is killed.
• January 12 - North Side Gang Hymie Weiss, with Bugs Moran and Vincent Drucci, attempt to kill Al Capone at a Chicago South Side restaurant and firing at Capone's car injuring chauffeur Sylvester Barton although Capone in unharmed.
• January 24 - North Side Gang leader Hymie Weiss, with George Moran, Vincent Drucci, and Frank Gusenberg ambush Chicago Outfit leader Johnny Torrio as he returns from shopping with his wife shooting him several times wounding him and his chauffeur Robert Barton. As George Moran is about to kill the wounded Torrio the gun misfires and is forced to flee as the police arrive on the scene. Soon after this attack Torrio retires to Italy giving leadership of Torrio's organization to his lieutenant Al Capone.
• February 9 - Johnny Torrio is sentenced by Judge Adam Cliffe to 9 months in Waukeagan County Jail . The jail is chosen by Torrio's lawyers as a facility nessessary for Torrio to recieve proper medical treatment however it was actually chosen for Torrio's protection as the prison warden Sheriff Edwin Ahlstrom was in the pay of Torrio's organization. Torrio was later escorted by Capone out of the city after his release.
• June 13 - Capone associate Angelo Genna is killed by members of the North Side Gang.
• November 13 - Samuzzo Amatuna is gunned down outside a Chicago West Side barber shop by the Hymie Weiss-Bugs Moran North Side Gang .
• December - Saltis-McErlane Gang member Joseph Brooks is supposedly killed by fellow member Pete Kunski out of professional jelousy.

Arts and literature

Births

• Philip C. Testa , Bruno crime famiy Underboss

Deaths

• Joseph Calabriese , Genna Brothers enforcer
• Karl Bates , Sheldon Gang hitman
• Edward Zion , Samuzzo Amatuna associate
• November 13 - Samuzzo Amatuna , Unione Siciliano leader and former member of the Genna Brothers gang.
• December - Joseph Brooks , Saltis-McErlane Gang member