Eugene Wilder Chafin (November 1, 1852 – November 30, 1920) was an American politician and writer who served as the Prohibition Party's presidential candidate during the 1908 and 1912 presidential elections. He was active in local politics in Wisconsin, statewide elections in Wisconsin, Illinois, and Arizona, and campaigned throughout the United States and the world in favor of the prohibition of alcohol.
After serving as a delegate to multiple Prohibition national conventions he rose to serving on the national committee and then received the presidential nomination twice, but declined to seek the nomination again for the 1916 presidential election.
