Iván Marino Ospina (called by his colleagues "Ivan the Terrible") (1940 – August 28, 1985) was a Colombian guerrilla and co-founder of the revolutionary group 19th of April Movement (M-19).

In 1970 he returned to Colombia to establish M-19 along with Jaime Bateman Cayón, a friend from the group Communist Youth (Juventudes Comunistas, JUCO), who had recently been expelled from the FARC.

A few days after this promotion, Ospina was arrested in Cali and sent to Bogotá where he was tortured in the notorious "Sacromonte caves" to the point that he made a suicide attempt.

In December of that year, at a reunion in Mexico, Ospina made what would be a monumental faux pas: he applauded mafia threats to Americans living in Colombia.

On November 6, 1985, a group of M-19 guerrillas named themselves the "Ivan Marino Ospina Company" after the recently deceased commander and commenced an attack on the Colombian Palace of Justice.