Robert Eugene Robideau (November 11, 1946 – February 17, 2009) was an American activist who was acquitted in the 1975 shooting deaths of two FBI agents in South Dakota.

Leonard Peltier was named by the FBI as a suspect in the case and placed on the agency's List of Ten Most Wanted Fugitives.

Robideau was arrested and tried together with Darrelle Dean Butler in a Federal court in Cedar Rapids, Iowa, for the killings of the FBI agents and was acquitted.

[2] In 2007, he toured the Canadian province of British Columbia claiming he was defending his cousin, Leonard Peltier's innocence against his murder charges and other convictions.

At the time of his death, he was survived by his wife Pilar, and two sons from a previous relationship(s), Bobby and Michael Robideau, who reside in South Dakota and Oregon respectively.