county in Illinois, United States From Wikipedia, the free encyclopedia
Effingham County is a county in the U.S. state of Illinois. As of the 2020 census, the population was 34,668.[1] Its county seat and largest city is Effingham. Some other cities in Effingham County, Illinois include Altamont, Teutopolis (T-Town), Beecher City, Montrose, Dieterich, Shumway, Watson, Mason, Edgewood, and Funkhouser.
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