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Marion, Illinois. The city of Marion is the county seat of Williamson County, Illinois, United States. [3] The population in Marion, IL was 16,855 according to the 2020 census. It is part of a dispersed urban area that developed out of early 20th-century coal fields. Today Marion serves as the largest retail trade center in Southern Illinois ...
Marion County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 37,729. [ 1 ] Its county seat is Salem. [ 2 ] Marion County comprises the Centralia, IL Micropolitan Statistical Area, which is included in the St. Louis - St. Charles - Farmington, MO -IL Combined Statistical Area.
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.
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] As of 2023, the largest of these is the Chicago ...
Warden. Daniel Sproul. The United States Penitentiary, Marion (USP Marion) is a large medium-security United States federal prison for male and female inmates in Southern Precinct, [1] unincorporated Williamson County, Illinois. [2][3] It is operated by the Federal Bureau of Prisons, a division of the United States Department of Justice.
Centralia is a city in Clinton, Jefferson, Marion, and Washington counties in the U.S. state of Illinois with the largest portion in Marion County. The city is the largest in three counties, Clinton, Marion, and Washington, but it is not a county seat for any of them. The population was 12,182 as of the 2020 census, down from 13,032 in 2010.
The two higher density areas of population are Metro East (pop. 700,000+), which is the partly industrialized Illinois portion of the St. Louis Metropolitan Area, and the Carbondale–Marion–Herrin, Illinois Combined Statistical Area, centered on Carbondale and Marion, a two-county area that is home to 123,272 residents.
There are 102 counties in Illinois. The most populous of these is Cook County, the second-most populous county in the United States and the home of Chicago, while the least populous is Hardin County. The largest by land area is McLean County, while the smallest is Putnam County. Illinois's FIPS state code is 17 and its postal abbreviation is IL.