Largest Mass Shooting in 2026 … 54th Cottage 15 person shooting Chicago Aug 29 2026 Southside Mass shooting in Chicago’s Washington Park on Saturday night, August 29, 2026, left one person dead and 14 others injured. The incident occurred in the 5400 block of South Cottage Grove Avenue, making it the city’s largest shooting of the year. Several large gatherings were happening in the park, including a reunion picnic for former residents of the Robert Taylor Homes. Around 11:30 p.m., Chicago Police officers were on the scene attempting to disperse the crowd when gunfire erupted. Sources indicate two unknown shooters dressed in all-black clothing and ski masks fired into the crowd from across the street. Someone inside the park reportedly returned fire. Investigators recovered 10 .40-caliber shell casings across the street and 26 additional casings including rifle rounds inside the park. 35-year-old man, identified by the medical examiner as Rontonio M. Guterz, was shot multiple times and pronounced dead at the University of Chicago Medical Center. Injured Victims: 14 additional people ranging in age from 21 to 47 were wounded 47-year-old woman was hospitalized in serious condition, while the remaining victims were listed in fair-to-good condition. As of August 31, 2026, no arrests have been announced, and Chicago Police Area detectives are continuing to investigate the motive. Largest mass shooting in chicago modern history Mello Buckzz record release party shooting was not the worst mass shooting in Chicago’s history, but it was one of the highest-casualty downtown shootings in recent years. The drive-by attack occurred last year on July 2, 2025, outside Artis Restaurant and Lounge in the River North neighborhood. It resulted in 4 people killed and 14 others injured, making a total of 18 victims.