Jefferson County, Illinois
Jefferson County: County in Illinois, United States
About
Jefferson County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 38,827 and a population density of 26 people per km². After 10 years in 2020 county had an estimated population of 37,235 inhabitants. Its county seat is Mount Vernon. The county was created 205 years ago in 1818.
Quick Facts about Jefferson County
| Population : | 37,235 (2020) |
| Country : | United States of America |
| State : | Illinois (United States) |
| Different from : | Jefferson County, Jefferson Parish, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County |
| Area : | 1512 km2 |
| Water as percent of area : | 2.2% |
| Land as percent of area : | 97.8% |
| Named for : | Thomas Jefferson |
| Capital : | Mount Vernon |
| Establishment : | January 01, 1819 |
| Time Zone : | America/Chicago |
| Local time : | 23:44:02 (21st December 2024) |
| Density : | 25 Pop. per km² as of 2020 |
| Population growth : | -4.28% (2010-2020) |
Geography
Jefferson County is located at 38°18'2"N 88°55'26"W (38.3005200, -88.9240100). It has 6 neighbors: Franklin County, Hamilton County, Marion County, Perry County, Washington County and Wayne County.
Jefferson County map
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The largest city of Jefferson County is Mount Vernon with a population of 14,511. Other cities include, Woodlawn population 670, Dix population 428, Waltonville population 422 and Harmony population 263. See all Jefferson County cities & populated places.
Jefferson County Populated Places
Cities, towns, neighborhoods & other populated places in Jefferson County.
| City Name | Population | Title |
|---|---|---|
| Shields | 36,451 | Township in Lake County, Illinois |
| Mount Vernon | 14,511 | City located near the center of Jefferson County, Illinois, United States |
| Spring Garden | 3,208 | Township in Jefferson County, Illinois |
| Ina | 2,279 | Village in Jefferson County, United States |
| Woodlawn | 670 | Community in the city of Birmingham, Jefferson County, Alabama, United States |
| Bluford | 660 | Village in the United States |
| Stratton | 432 | Township in Edgar County, Illinois |
| Dix | 428 | City in Illinois, United States of America |
| Waltonville | 422 | Human settlement in Illinois, United States of America |
| Bonnie | 380 | Village in Illinois |
| Belle Rive | 347 | Village Jefferson County, Illinois, United States |
| Harmony | 263 | Unincorporated community in Illinois |
| Nason | 228 | City in Jefferson County, Illinois |
- Official Website
Official website of Jefferson County
Jefferson County has 6 neighbours.
- Franklin County county in Illinois, United States
- Hamilton County county in Illinois, United States
- Marion County county in Illinois, United States
- Perry County county in Illinois, United States
- Washington County county in Illinois, United States
- Wayne County county in Illinois, United States
- Mount Vernon
Demographics
According to census records, the population of Jefferson County decreased by 4.28% in 10 years.
| Year | Population | % Change | Method |
| 2010 | 38,827 | - | census |
| 2011 | 38,749 | -0.2% | estimation process |
| 2012 | 38,658 | -0.24% | estimation process |
| 2013 | 38,641 | -0.04% | estimation process |
| 2014 | 38,374 | -0.7% | estimation process |
| 2015 | 38,272 | -0.27% | estimation process |
| 2016 | 38,214 | -0.15% | estimation process |
| 2017 | 38,045 | -0.44% | estimation process |
| 2018 | 37,708 | -0.89% | estimation process |
| 2019 | 37,684 | -0.06% | estimation process |
| 2020 | 37,235 | -1.21% | estimation process |
Comitatul Jefferson, Comte de Jefferson, Comté de Jefferson, Condado de Jefferson, Condado han Jefferson, Contea di Jefferson, Dzhefersun, Dzhefferson, Hrabstwo Jefferson, Jefferson, Jefferson Comitatus, Jefferson Kun, Jefferson Kūn, Jefferson konderria, Jefferson megye, Jefferson srjan, Jeffersoni maakond, Okrug DZeferson, Quan Jefferson, Quận Jefferson, jefason jun, jepharasana ka'unti, jie fu xun xian, mqatʿt jyfyrswn, shhrstan jfrswn aylynwy, Джеферсън, Джефферсон, Округ Џеферсон, Ջեֆֆերսոն շրջան, جیفرسن کاؤنٹی، الینوائے, جیفرسن کاؤنٹی، الینوۓ, شهرستان جفرسون، ایلینوی, مقاطعة جيفيرسون, জেফারশন কাউন্টি, ジェファーソン郡, 傑佛遜縣
People born in Jefferson County (1)
American politician Newton R. Casey was born in Jefferson County
Other places with the same name (25)
- Jefferson County , Kentucky county in Alabama, United States with a population of 767,452 people.
- Jefferson County , Alabama county in Alabama, United States with a population of 655,342 people.
- Jefferson County , Colorado county in Colorado, United States with a population of 583,283 people.
- Jefferson County , Texas county in Texas, United States with a population of 250,127 people.
- Jefferson County , Missouri county in Missouri, United States with a population of 226,543 people.
- Jefferson County , New York county in New York, United States with a population of 108,095 people.
- Jefferson County , Wisconsin county in Wisconsin, United States with a population of 85,038 people.
- Jefferson County , Arkansas county in Arkansas, United States with a population of 65,377 people.
- Jefferson County , Ohio county in Ohio, United States with a population of 64,939 people.
- Jefferson County , West Virginia county in West Virginia, United States with a population of 57,486 people.
- Jefferson County , Tennessee county in Tennessee, United States with a population of 55,307 people.
- Jefferson County , Pennsylvania county in Pennsylvania, United States with a population of 43,108 people.
- Jefferson County , Washington county in the state of Washington, United States with a population of 32,700 people.
- Jefferson County , Indiana county in Indiana, United States with a population of 32,110 people.
- Jefferson County , Idaho county in Idaho, United States with a population of 29,871 people.
- Jefferson County , Oregon county in Oregon, United States with a population of 24,856 people.
- Jefferson County , Kansas county in Kansas, United States with a population of 19,032 people.
- Jefferson County , Iowa county in Iowa, United States with a population of 18,347 people.
- Jefferson County , Georgia county in Georgia, United States with a population of 15,267 people.
- Jefferson County , Florida county in Florida, United States of America with a population of 14,543 people.
- Jefferson County , Montana county in Montana, United States with a population of 12,360 people.
- Jefferson County , Nebraska county in Nebraska, United States with a population of 7,099 people.
- Jefferson County , Mississippi county in Mississippi, United States with a population of 6,997 people.
- Jefferson County , Oklahoma county in Oklahoma, United States with a population of 5,949 people.
Illinois Other Counties (more counties)
| County Name | Population | Title |
|---|---|---|
| Cook County | 5,108,284 | County in Illinois, United States |
| Chicago | 2,677,643 | The third most populous city in the United States and the center of the Chicago metropolitan area. |
| 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 |
| 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 | The second most populous city in Illinois. |
| 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 |
| Naperville | 147,986 | The second most populous city in Illinois. |
