- a political party formed in 1912 under the leadership of Theodore Roosevelt, advocating popular control of government, direct primaries, the initiative, the referendum, woman suffrage, etc.
- a similar party formed in 1924 under the leadership of Robert M. La Follette.
- a political party formed in 1948 under the leadership of Henry A. Wallace.
- a US political party, made up chiefly of dissident Republicans, that nominated Theodore Roosevelt as its presidential candidate in 1912 and supported primaries, progressive labour legislation, and other reforms
- a US political party, composed mostly of farmers, socialists, and unionists, that nominated Robert La Follette for president in 1924 and supported public ownership of railways and of public utilities and other reforms
- a US political party, composed chiefly of dissident Democrats, that nominated Henry Wallace for president in 1948 and supported the nationalization of key industries, advocated social reforms, and opposed the Cold War
- (in South Africa) the former name for Progressive Federal Party
