Martin Luther King, Jr. was arrested 30 times between 1955 and 1965. All occurred during his leadership in the African American Civil Rights Movement. His first arrest was in 1955 leading the bus boycott in Montgomery, Ala.
Dr. King's last arrest was in 1965 for demonstrating without a permit in Selma, Ala. His sentence was upheld by the Supreme Court in 1967. Of interest, the King Legacy site notes Dr. King's arrest in October 1960 during a sit-in at a restaurant in Atlanta. Although he was sentenced, he was released after then presidential candidate John Kennedy and Robert Kennedy intervened.