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Williamson County is a county in Southern Illinois. At the 2020 census, it had a population of 67,153. [1] The largest city and county seat is Marion. [2] Williamson County is included in the Carbondale-Marion, IL Metropolitan Statistical Area. This area of Southern Illinois is known locally as "Little Egypt". [citation needed]
Illinois's FIPS state code is 17 and its postal abbreviation is IL. What is now Illinois was claimed as part of Illinois County, Virginia, between 1778 and 1782. Modern-day county formation dates to 1790 when the area was part of the Northwest Territory; two counties—St. Clair and Knox—were created at that time.
The U.S. State of Illinois currently has 47 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated 14 combined statistical areas, 12 metropolitan statistical areas, and 21 micropolitan statistical areas in Illinois. [1]
Putnam County is the least extensive county in the U.S. state of Illinois.According to the 2020 census, it had a population of 5,637. [1] The county seat is Hennepin. [2] The county was formed in 1825 out of Fulton County and named after Israel Putnam, [3] who was a general in the American Revolution.
Illinois' ecology is in a land area of 56,400 square miles (146,000 km 2); the state is 385 miles (620 km) long and 218 miles (351 km) wide and is located between latitude: 36.9540° to 42.4951° N, and longitude: 87.3840° to 91.4244° W, [1] with primarily a humid continental climate.
Map of Vermilion County. Vermilion County is located along the eastern border of Illinois; its northern border is about 95 miles (153 km) south of Chicago. Vermilion County in Illinois and Vermillion County in Indiana are two of twenty-two counties or parishes in the United States with the same name to border each other across state lines. [11]
The Illinois side includes Henry County, Mercer County, and Rock Island County. [4] In extreme northwestern Illinois the Driftless Zone, a region of unglaciated and therefore higher and more rugged topography, occupies a small part of the state. Charles Mound, located in this region, is the state's highest elevation above sea level.
Cumberland County is a county located in the U.S. state of Illinois. As of the 2020 census, the population was 10,450. [1] Its county seat is Toledo. [2] Cumberland County is part of the Charleston–Mattoon, IL Micropolitan Statistical Area.