Chicago 13 is the eleventh studio album by the American band Chicago, released in 1979. The follow-up to Hot Streets, Chicago 13 is often critically disfavored. This would be the band's final release that features lead guitarist Donnie Dacus, who had followed late, founding lead guitarist, Terry Kath. All band members would contribute to the songwriting (one of only two albums where this is the case, with the other being Chicago VII).