Williamson County , Illinois

Williamson County: County in Illinois, United States

About

Williamson County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 66,357 and a population density of 149 people per km². After 10 years in 2020 county had an estimated population of 66,415 inhabitants. Its county seat is Marion. The county was created 182 years ago in 1839.

Williamson County Quick Facts

Population : 66,415 (2020)
Country : United States of America
State : Illinois (United States)
Different from : Williamson County, Williamson County
Area : 444 km2
Water as percent of area : 5.4%
Land as percent of area : 94.6%
Named for : Hugh Williamson
Capital : Marion
Establishment : February 02, 1839
Time Zone : America/Chicago
Local time : 17:47:06 (28th November 2021)
Density : 150 Pop. per km² as of 2020
Population growth : 0.09% (2010-2020)
Weather : 31℉ Partly Cloudy 7-days weather
Williamson County locator map
Location of Williamson County on Illinois map.
Williamson County Courthouse in Marion image
Williamson County Courthouse in Marion
Williamson County Courthouse in Marion image

Geography

Williamson County is located at 37°43'49"N 88°55'48"W (37.7302500, -88.9299400). It has 6 neighbors: Franklin County, Jackson County, Johnson County, Pope County, Saline County and Union County.

Williamson County map

The largest city of Williamson County is Marion with a population of 17,803. Other cities include, Herrin population 12,625, Carterville population 5,834, Johnston City population 3,389 and Crainville population 1,419. See all Williamson County cities & populated places.

Weather

Williamson County forecast: Partly cloudy, with a low around 31. West northwest wind around 5 mph. more

Williamson County has 6 neighbours.

  • Marion

Demographics

The population of Williamson County increased by 0.09% in 10 years.

Year Population % Change Method
2010 66,357 - census
2011 66,732 0.56% estimation process
2012 66,776 0.07% estimation process
2013 67,450 1% estimation process
2014 67,412 -0.06% estimation process
2015 67,428 0.02% estimation process
2016 67,454 0.04% estimation process
2017 67,049 -0.6% estimation process
2018 66,982 -0.1% estimation process
2019 66,597 -0.58% estimation process
2020 66,415 -0.27% estimation process

Comitatul Williamson, Comte de Williamson, Comté de Williamson, Condado de Williamson, Condado han Williamson, Contea di Williamson, Hrabstwo Williamson, Okrug Vilijamson, Owilyamson srjan, Quan Williamson, Quận Williamson, Uil'jamson, Uilijamsun, Vil'jamson, Williamson, Williamson Comitatus, Williamson Kun, Williamson Kūn, Williamson konderria, Williamson megye, mqatʿt wylyamswn, shhrstan wylyamswn aylynwy, u'iliyamasana ka'unti, u~iriamuson jun, wei lian sen xian, Вільямсон, Округ Вилијамсон, Уилиямсън, Уильямсон, Ուիլյամսոն շրջան, شهرستان ویلیامسون، ایلینوی, مقاطعة ويليامسون, ولیمسن کاؤنٹی, ولیمسن کاؤنٹی، الینوائے, উইলিয়ামসন কাউন্টি, ウィリアムソン郡, 威廉森縣

Local Places in Williamson County

Other places with the same name (3)

Williamson County Populated Places (more)

Cities, Towns, Neighborhoods & Other Populated Places in Williamson County.

City Name Population Title
Marion 17,803 City in and the county seat of Williamson County, Illinois, United States
Herrin 12,625 City in Williamson County, Illinois, United States
Crestwood 10,604 Village in United States of America
Carterville 5,834 City in Williamson County, Illinois, United States
Johnston City 3,389 City in Illinois, United States
Sleepy Hollow 3,215 Village in Illinois
Cambria 1,648 Village in the United States
Crainville 1,419 City in Illinois, United States of America
Energy 1,086 Village in Illinois
Hurst 780 City in Illinois, USA
Bainbridge 569 Township in Schuyler County, Illinois
Creal Springs 521 Township in Williamson County, Illinois
Freeman Spur 276 Human settlement in United States of America
Bush 263 Human settlement in Illinois, United States of America
Colp 208 Human settlement in Illinois, United States of America
Spillertown 197 Human settlement in Illinois, United States of America

Illinois Other Counties (more counties)

County Name Population Title
Cook County 5,108,284 County in Illinois, United States
Chicago 2,677,643 City and county seat of Cook County, Illinois, United States
DuPage County 917,481 County in Illinois, United States
Lake County 693,593 County in Oregon, United States
Will County 688,726 County in Illinois, United States
Kane County 531,010 County in southern Utah, United States
Markham 328,966 City in Cook County, Illinois, United States
McHenry County 305,888 County in Illinois, United States
Winnebago County 281,295 County in Illinois, United States
Madison County 262,635 County in Montana, United States
Saint Clair County 258,046 The County of St.
Champaign County 209,192 County in Illinois, United States
Aurora 196,383 City in Kane County, Illinois, United States
Sangamon County 193,882 County in Illinois, United States
Peoria County 177,652 County in Illinois, United States of America
McLean County 171,256 County in North Dakota, United States