Jerry Clyde Rubin (July 14, 1938 – November 28, 1994) was an American social activist, anti-war leader, and counterculture icon during the 1960s and early 1970s. Despite being known for holding radical views when he was a political activist, he ceased holding his more extreme views at some point in the 1970s and instead opted for a successful career as a businessman. In the 1960s, during his political activism heyday, he was known for being one of the co-founders of the Youth International Party (YIP) whose members were referred to as Yippies, and standing trial in the Chicago Seven case.

Rubin was born in Cincinnati, Ohio, the son of Esther (Katz), a homemaker, and Robert Rubin, a trucker who later became a Teamsters' union official.

Rubin attended Cincinnati's Walnut Hills High School, co-editing the school newspaper, The Chatterbox and graduating in 1956. While in high school Rubin began to write for The Cincinnati Post, compiling sports scores from high school games. He attended Oberlin College, and Hebrew University in Jerusalem, and later went on to graduate from the University of Cincinnati, receiving a degree in history. Rubin attended the University of California, Berkeley in 1964 but dropped out to focus on social activism.

Rubin's parents died within ten months of each other, leaving Rubin to take care of his younger brother, Gil, who was 13 at the time. Jerry wanted to teach Gil about the world and planned to take him to India. When relatives threatened to sue to obtain custody of Gil, Jerry decided to take his brother to Israel instead, settling in Tel Aviv. There, Rubin worked on a kibbutz, and studied sociology while his brother, who had learned Hebrew, decided to stay in Israel and moved permanently to a kibbutz. Before returning to social and political activism, Rubin made a visit to Havana, to learn first-hand about the Cuban revolution.

Rubin began to demonstrate on behalf of various left-wing causes after dropping out of UC Berkeley. Rubin also ran for mayor of Berkeley, on a platform opposing the Vietnam War, and supporting Black power and the legalization of marijuana, receiving over 20 percent of the vote. Rubin turned his attention to political protest, his first in Berkeley, protesting against the refusal of a local grocer to hire African Americans. Soon Rubin was leading protests of his own. Rubin organized the Vietnam Day Committee, that led some of the first big protests against the Vietnam War. He took part in planning the world's largest teach-in against the war, organized rallies and demonstrations that attempted to stop a train transporting troops to the Oakland Army Base, as well as trucks carrying napalm. The Vietnam Day Committee was a unique early antiwar organization in that it enjoyed large local participation and is believed to be a forerunner to the national movement against the war in Vietnam.

Rubin was one of the founding members of the Youth International Party (YIP) or Yippies, along with social and political activist Abbie Hoffman and satirist Paul Krassner. The Yippies were not a formal organization with a membership list or a direct relationship with constituency but played upon the media's appetite for anything new and different. They were influenced by Marshall McLuhan's ideas on the importance of electronic communication and believed that if radical events were made more entertaining the media, especially television would give them greater coverage.

As Rubin recollected:

... [T]he more visual and surreal the stunts we could cook up, the easier it would be to get on the news, and the more weird and whimsical and provocative the theater, the better it would play.