Wacker is an unincorporated community in Carroll County, Illinois, United States. Wacker is located near a railroad line southeast of Savanna and southwest of Mount Carroll.
In 1894, farmer John Wacker let a part of his land for a creamery, around which a community grew. A post office was opened on December 12, 1894,Callary, Edward. Place Names of Illinois, p. 361 (2010) and closed in 1906.Post Offices of Carroll County, retrieved 2 July 2026 It soon had several homes, two churches,(23 May 1935). Wacker churches to combine choirs in concert June 14, The Thomson Review and a blacksmith shop. The original creamery burned down in 1923 and was rebuilt. A flood in 1896 caused significant damage to the community.
In 1966, one of the two town churches (Church of the Brethren) closed.Thiem, E. George, ed. Carroll County: A Goodly Heritage, Carroll County Historical Society (1968)
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