|Leader||Ignatius L. Donnelly|
|Split from||Republican Party|
|Merged into||Populist Party|
|Political position||Left wing|
The Anti-Monopoly Party was a short-lived American political party. The party nominated Benjamin F. Butler for President of the United States in 1884, as did the Greenback Party, which ultimately supplanted the organization.
The Anti-Monopoly Party was founded as a national political party in 1884 at its convention in Chicago, which took place on May 14, 1884. Prior to this convention, however, there were Anti-Monopoly Parties operating at the state level, notably in California and New York. The party's platform was similar to those of other parties identified as progressive. The party advocated such measures as direct election of senators, a graduated income tax, industrial arbitration and the establishment of labor bureaus to enhance the legal rights of organized labor, and antitrust legislation, among other matters. The party also opposed the use of the tariff and the granting of public land to railroads and other corporations.
Former U.S. army general and Massachusetts governor Benjamin F. Butler was nominated to run as the party's candidate for president in the 1884 election; he was similarly nominated by the Greenback Party. Both parties nominated Absolom M. West of Mississippi for vice president. Butler received 175,370 votes in the election. The party largely disappeared after the election, though a small fringe remained in Kansas, running local candidates until 1886.
The People's Party's Omaha Platform contained many planks of the Anti-Monopoly platform. Subsequently, the Progressive movement saw the enactment of many political reform measures first championed by the Anti-Monopolists and Greenbackers.