|Marshall County Illinois Cities/Towns - Henry, Hopewell, La Rose, Lacon (County Seat), Saratoga Center, Sparland, Toluca, Varna, Washburn, Wenona
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Marshall County is a county located in the U.S. state of Illinois. As of 2016, the population is 11,939. Its county seat is Lacon.
Marshall County was formed in 1839. It was named in honor of John Marshall, Chief Justice of the United States Supreme Court, who died in 1835.