The Socialist Party of Illinois (SPIL) is a political party in the state of Illinois. It was affiliated with the Socialist Party of America. It was founded in September 1901, though the grouping met in 1900 at a convention in Chicago and supported Eugene V. Debs for president in 1900. It was the successor to the Social Democratic Party of America.[1]
In 1915, the party had 6,004 members. 44 party members held public office in that year, including one mayor, 18 aldermen and 2 members of the Illinois House of Representatives among others. The Chicago Socialist was the newspaper of the Socialist Party of Illinois.[1]
The Chicago Socialist Party was the most active local in the SPIL and one of the most active in the United States.[2] It is now an affiliate of the Socialist Party USA.