|Shelby County Illinois Cities/Towns -
Clarksburg, Cowden, Findlay, Herrick, Lakewood, Oconee, Shelbyville (County Seat), Sigel, Stewardson, Strasburg, Tower Hill, Windsor
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Shelby County is a county located in the U.S. state of Illinois. As of 2000, the population was 22,893. Its county seat is Shelbyville.
Shelby County was formed in 1827. It was named in honor of Isaac Shelby, Governor of Kentucky and hero of the Revolutionary War.