Michael McColgan is an American musician, and is a founding member and former lead singer of the American punk band Street Dogs and a founding member and former original lead singer of the American Celtic punk band Dropkick Murphys.

Street Dogs were an American punk rock band from Boston, Massachusetts, formed in 2002 by former Dropkick Murphys singer Mike McColgan. The band disbanded in early 2020 after 17 years together.