The Carlinville Chapter House is a historic building located at 509 Beacon St. in Carlinville, Illinois. The building was constructed between 1909 and 1910 as a meetinghouse for Carlinville's chapter of the American Woman's League. The American Woman's League was a political and social organization founded by magazine publisher Edward Gardner Lewis in 1908. The organization was created to promote feminist causes, particularly the women's suffrage movement; Lewis also intended for the organization to promote and sell his women's magazines. Lewis commissioned the St. Louis architectural firm of Helfensteller, Hirsch & Watson to design five classes of buildings which the League would use as meetinghouses. The Carlinville Chapter House is an example of a Class I building, which was designed for clubs with 30 to 60 members. The building was designed in the Prairie School style and cost $1,200. After the club disbanded, the building was converted to a private home.