Montgomery County, Illinois

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Montgomery County is a county located in the U.S. state of Illinois. As of 2000, the population was 30,652. Its county seat is Hillsboro, Illinois[1].



Montgomery County was formed in 1821 out of Bond and Madison Counties. It was named in honor of Richard Montgomery, an American Revolutionary War general killed in 1775 while attempting to capture Quebec City, Canada.[2] Perrin's 1882 History of Montgomery County relates that the County was named in honor of Gen. Montgomery, but goes on to say that "others are dubious as to whence it received its name."

Montgomery County from the time of its creation to 1827

Montgomery County between 1827 and 1839, when it was reduced to its present borders


According to the U.S. Census Bureau, the county has a total area of 710 square miles (1,838 km²), of which 704 square miles (1,823 km²) is land and 6 square miles (15 km²) (0.84%) is water.

Adjacent Counties

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