The Citizens Party was a political party in the United States. It was founded in Washington, D.C., by Barry Commoner, who aimed to gather under one banner a nationwide political organization of progressive, environmentalist and liberal groups, many of which were unsatisfied with President Jimmy Carter's administration, for the first time since the dissolution of the national Progressive Party in the 1960s. The Citizens Party registered with the Federal Elections Commission at the end of 1979. Commoner, a professor of environmental science at Washington University in St. Louis, was the head of the Center for the Biology of Natural Systems in St. Louis, Missouri and editor of Science Illustrated magazine.

The 1980 United States presidential election was the 49th quadrennial presidential election, held on November 4, 1980. The Republican nominee, former California governor Ronald Reagan, defeated incumbent Democratic President Jimmy Carter in a landslide victory.