| Shirt Tails | |
| Founding Location: | Five Points, Manhattan, New York City |
| Years Active: | 1830s-1860s |
| Territory: | Lower East Side, Manhattan, New York City |
| Ethnic Makeup: | Irish American |
| Membership Est: | ? |
| Criminal Activities: | street fighting, knife fighting, assault, murder, robbery |
| Allies: | Forty Thieves, Roach Guards, Tammany Hall Chichesters, Dead Rabbits, |
| Rivals: | Bowery Boys, Atlantic Guards |
The Shirt Tails were a mid-19th-century street gang based in the Five Points slum in Manhattan, New York, United States, who wore their shirts on the outside of their pants as 19th-century Chinese laborers would dress as a form of insignia and as a sign of gang group affiliation. Members kept their weapons - as many as three or four at a time - concealed beneath their shirts; this discreet measure stands in contrast to competing gangs who flaunted their weapons in order to intimidate.
Never numbering more than a few hundred members, the Shirt Tails, like many other gangs, disappeared shortly before the American Civil War (although they did participate in a coalition of gangs under the Dead Rabbits and fought against the Bowery Boys during the New York Draft Riots), with its remaining members dissipating or joining other Irish gangs.