Knox County, Illinois

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Knox County is a county located in the U.S. state of Illinois. As of 2000, the population was 55,836. Its county seat is Galesburg, Illinois[1].

Knox County is part of the Galesburg Micropolitan Statistical Area.



Knox County was named in honor of Henry Knox, the first US Secretary of War.

The first "Knox County" in what today is Illinois was unrelated to the modern incarnation. In 1790, the land of the Indiana Territory that was to become Illinois was divided into two counties: St. Clair and Knox. The latter included land in what was to become Indiana. When Knox County, Indiana, was formed from this portion of the county in 1809, the Illinois portions were subdivided into counties that were given other names.

The modern Knox County, Illinois, was organized in 1825, from Fulton County, itself a portion of the original St. Clair County.

Knox County between its creation in 1825 and 1831

Knox County between 1831 and 1839, when it was reduced slightly to its current size


According to the U.S. Census Bureau, the county has a total area of 720 square miles (1,864 km²), of which 716 square miles (1,855 km²) is land and 3 square miles (9 km²) (0.48%) is water.

Major highways

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