American Party may refer to:

Political parties in the United States

• The Toleration Party, also known as the American Party, established in Connecticut to oppose the Federalist Party
• The official name of the nativist "Know Nothing" party after 1855
• The American Party (Utah), an anti-Mormon party that existed in Utah from 1905 to 1911
• A party established in 1909 to put the Iowa-based United Christian Party (United States) into new organizational form
• The American Party (1914), a party organized by ex-governor of New York William Sulzer
• The American Party (Texas), a short-lived political party in Texas operated for the benefit of James E. Ferguson
• The American Party (1924), which ran Gilbert Nations for President of the United States
• The American Party (1969), a successor of the 1968 American Independent Party
• The American Party of South Carolina, a minor centrist party