The United Farm Workers of America, or more commonly just United Farm Workers (UFW), is a labor union for farmworkers in the United States. It originated from the merger of two workers' rights organizations, the National Farm Workers Association (NFWA) led by César Chávez and Dolores Huerta and the Agricultural Workers Organizing Committee (AWOC) led by organizer Larry Itliong. They allied and transformed from workers' rights organizations into a union as a result of a series of strikes in 1965, when the Filipino American and Mexican American farmworkers of the AWOC in Delano, California, initiated a grape strike, and the NFWA went on strike in support. As a result of the commonality in goals and methods, the NFWA and the AWOC formed the United Farm Workers Organizing Committee on August 22, 1966. This organization was accepted into the AFL–CIO in 1972 and changed its name to the United Farm Workers Union.

A trade union or labor union, often simply referred to as a union, is an organization of workers whose purpose is to maintain or improve the conditions of their employment, such as attaining better wages and benefits, improving working conditions, improving safety standards, establishing complaint procedures, developing rules governing status of employees and protecting and increasing the bargaining power of workers.