Alpo Martinez, or simply Alpo, is a former American drug dealer of Puerto Rican ancestry from Harlem, New York City, New York, United States who rose to prominence in the mid–1980s.

In addition to New York, Martinez expanded his drug trade to other parts to other cities, notably Washington D.C.

Martinez was released in 2015 while serving a 35-year sentence for 14 counts of murder at ADX Florence, a federal supermax prison located in Fremont County, Colorado after testifying against former associates.

Martinez is living under a United States witness protection program.[citation nee