McHenry County was formed in 1836 out of Cook and LaSalle counties. The county was named for Major William McHenry, a member of the Illinois Militia during Tecumseh’s War, a major during the Blackhawk War in 1832, and a member of the Illinois House of Representatives and Senate. According to the 2020 Census, it had a population of 310,229, making it the sixth-most populous county in Illinois. Its county seat is Woodstock.
Over the past few years, the Concerned Citizens of McHenry County have engaged in a broad range of activities to support goals of freedom, security and prosperity for all, including:
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