Marilyn Jean Buck (December 13, 1947–August 3, 2010) was an American Marxist, feminist poet, and anti-war, anti-imperialist, and anti-racist activist, who was imprisoned for her participation in the 1979 prison escape of Assata Shakur, the 1981 Brink's robbery, and the 1983 U.S. Senate bombing.

Louis Buck opposed segregation at St. Andrew's Episcopal School in Austin, Texas, picketed, and harshly criticized the bishop.

[9] She subsequently returned to San Francisco where she worked with Third World Newsreel in outreach in support of Native American and Palestinian sovereignty and against U.S. intervention in Iran and Vietnam and in solidarity with the Black liberation movement.

Papers there led police to an address in Mount Vernon, New York, where they found bloody clothing and ammunition belonging to Buck.

[14] In 1985, Buck and six others were convicted in the Resistance Conspiracy case, a series of bombings in protest of United States foreign policy in the Middle East and Central America.

1990: Under a plea agreement, Buck was sentenced to an additional 10 years for having taken part in the bombings of government buildings, including the United States Capitol, during her time as a fugitive.

Her poems appeared in the anthologies Hauling Up the Morning,[24] Wall Tappings,[25] Igniting a Revolution: Voices in Defense of the Earth,[26] Seeds of Fire,[27] and in her chapbook, Rescue the Word.

Buck translated and introduced Cristina Peri Rossi's poetry book State of Exile, which was Number 58 in the City Lights Pocket Poets Series.

[29] Marilyn Buck died at home in Brooklyn on August 3, 2010, after a long battle with uterine cancer, having been released from the Federal Medical Center, Carswell on July 15 of that year.