Mullen Gang
| Founded | c. 1950s |
|---|---|
| Founding location | Boston, Massachusetts, United States |
| Years active | c. 1950s–1972 |
| Territory | South Boston |
| Ethnicity | Irish American |
| Membership (est.) | 60 |
| Leader(s) | |
| Activities | Racketeering, armed robbery, auto theft, burglary, extortion, loansharking, illegal gambling, murder |
| Allies | Winter Hill Gang |
| Rivals | Killeen Gang |
The Mullen Gang was an Irish-American gang operating in Boston, Massachusetts. The gang derived its name from a commemorative plaque to a war hero named John Joseph Mullen, which was located on a street corner in South Boston that the gang's members frequented. After a decade-long gang war agaisnt another Irish mob group, the Killeen Gang, for control of criminal rackets in South Boston, both gangs were consolidated under the control of the Winter Hill Gang in 1972.