The Young Socialist Alliance (YSA) was a Trotskyist youth group of the Socialist Workers Party (SWP) in the United States of America. It was founded in 1960, although it had roots going back several years earlier. It was dissolved in 1992. The membership peaked in 1971 at 1,434
The origins of the YSA were in a regroupment of younger members of the SWP with others in the aftermath of the Hungarian Revolution of 1956. The principal other component was a group from the Young Socialist League, the youth group of an adult organization called the Independent Socialist League, led by Max Shachtman. The principal figures from the YSL were Tim Wohlforth, Shane Mage, and James Robertson, who joined with young members of the SWP (hence the word "alliance") to found the "Young Socialist" newspaper. A founding conference of the Young Socialist Alliance was held in April 1960 in Philadelphia, Pennsylvania, though local Young Socialist supporter groups had existed in several cities for a few years beforehand. The initial YSA central leadership was comprised two rival groups: Wohlforth, Robertson, and Mage who had come over from the YSL, and SWP majority supporters represented by Nora Roberts, Bert Deck, and others. In late 1961 at the second YSA convention, held in Chicago, the SWP central leadership arranged the removal of Wohlforth and Robertson from the YSA on age grounds and replaced the initial majority group with Barry Sheppard and Peter Camejo from Boston, Sheppard as national chairman and Camejo as national secretary. At that time the Young Socialist Alliance had approximately 150 members nationally
An early activity of the YSA was a national campaign in defense of three of its members who were students at Indiana University in Bloomington, Indiana, Tom Morgan, Ralph Levitt, and Jim Bingham, who were indicted in 1963 by local prosecutor Thomas Hoadley under a little used anticommunist statute. The students were eventually acquitted.