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Johnson County, Illinois facts for kids

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Johnson County
U.S. county
Johnson County Courthouse in Vienna
Johnson County Courthouse in Vienna
Map of Illinois highlighting Johnson County
Location within the U.S. state of Illinois
Map of the United States highlighting Illinois
Illinois's location within the U.S.
Country  United States
State  Illinois
Founded 1812
Named for Richard Mentor Johnson
Seat Vienna
Largest city Vienna
Area
 • Total 349 sq mi (900 km2)
 • Land 344 sq mi (890 km2)
 • Water 4.9 sq mi (13 km2)  1.4%
Population
 (2020)
 • Total 13,308 Increase
 • Density 38/sq mi (15/km2)
Time zone UTC−6 (Central)
 • Summer (DST) UTC−5 (CDT)
Congressional district 12th

Johnson County is a county in the U.S. state of Illinois. According to the 2020 census, it has a population of 13,308. Its county seat is Vienna. It is located in the southern portion of Illinois known locally as "Little Egypt".

History

RichardJohnsonVP
Richard M. Johnson

Johnson County was organized in 1812 out of Randolph County. It was named for Richard Mentor Johnson, who was then a U.S. Congressman from Kentucky. In 1813, Johnson commanded a Kentucky regiment at the Battle of the Thames, after which he claimed to have killed Tecumseh in hand-to-hand combat. Johnson went on to become Vice President of the United States.

  • Johnson County Illinois 1812

    Johnson County at the time of its creation to 1816

  • Johnson County Illinois 1816

    Johnson County between 1816 and 1818

  • Johnson County Illinois 1818

    Johnson County between 1818 and 1843

  • Johnson County Illinois 1843

    Johnson County in 1843, when it was reduced to its present size

Geography

According to the U.S. Census Bureau, the county has a total area of 349 square miles (900 km2), of which 344 square miles (890 km2) is land and 4.9 square miles (13 km2) (1.4%) is water.

Climate and weather

Weather chart for Vienna, Illinois
J F M A M J J A S O N D
 
 
3.4
 
43
25
 
 
3.4
 
50
29
 
 
4.6
 
60
38
 
 
4.7
 
71
46
 
 
5.2
 
79
55
 
 
4.1
 
87
63
 
 
3.8
 
90
67
 
 
3.6
 
90
65
 
 
3.3
 
84
58
 
 
3.2
 
73
47
 
 
4.7
 
59
39
 
 
4.4
 
47
29
temperatures in °F
precipitation totals in inches
source: The Weather Channel
Metric conversion
J F M A M J J A S O N D
 
 
86
 
6
-4
 
 
86
 
10
-2
 
 
117
 
16
3
 
 
120
 
22
8
 
 
131
 
26
13
 
 
104
 
31
17
 
 
95
 
32
19
 
 
91
 
32
18
 
 
83
 
29
14
 
 
80
 
23
8
 
 
120
 
15
4
 
 
112
 
8
-2
temperatures in °C • precipitation totals in mm

In recent years, average temperatures in the county seat of Vienna have ranged from a low of 25 °F (−4 °C) in January to a high of 90 °F (32 °C) in July, although a record low of −20 °F (−29 °C) was recorded in January 1977 and a record high of 103 °F (39 °C) was recorded in August 2007. Average monthly precipitation ranged from 3.16 inches (80 mm) in October to 5.16 inches (131 mm) in May.

Major highways

Transit

  • List of intercity bus stops in Illinois

Adjacent counties

National protected areas

Demographics

Historical population
Census Pop. %±
1820 843 —
1830 1,596 89.3%
1840 3,626 127.2%
1850 4,114 13.5%
1860 9,342 127.1%
1870 11,248 20.4%
1880 13,078 16.3%
1890 15,013 14.8%
1900 15,667 4.4%
1910 14,331 −8.5%
1920 12,022 −16.1%
1930 10,203 −15.1%
1940 10,727 5.1%
1950 8,729 −18.6%
1960 6,928 −20.6%
1970 7,550 9.0%
1980 9,624 27.5%
1990 11,347 17.9%
2000 12,878 13.5%
2010 12,582 −2.3%
2020 13,308 5.8%
2023 (est.) 13,326 5.9%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2010
USA Johnson County, Illinois age pyramid
2000 census age pyramid for Johnson County, skewed toward male because of the Vienna Correctional Center, an Illinois State Prison for men.

2010

Whereas, according to the 2010 U.S. Census Bureau:

2010

As of the 2010 United States Census, there were 12,582 people, 4,584 households, and 3,270 families residing in the county. The population density was 36.6 inhabitants per square mile (14.1/km2). There were 5,598 housing units at an average density of 16.3 per square mile (6.3/km2). The racial makeup of the county was 89.0% white, 8.0% black or African American, 0.2% Asian, 0.2% American Indian, 1.6% from other races, and 1.0% from two or more races. Those of Hispanic or Latino origin made up 3.0% of the population. In terms of ancestry, 17.6% were German, 11.5% were Irish, 10.9% were English, and 6.5% were American.

Of the 4,584 households, 28.8% had children under the age of 18 living with them, 59.2% were married couples living together, 8.3% had a female householder with no husband present, 28.7% were non-families, and 25.3% of all households were made up of individuals. The average household size was 2.41 and the average family size was 2.85. The median age was 42.2 years.

The median income for a household in the county was $41,619 and the median income for a family was $47,423. Males had a median income of $48,047 versus $30,904 for females. The per capita income for the county was $16,402, the lowest of all 102 counties in Illinois and 57th in the U.S. About 11.1% of families and 13.6% of the population were below the poverty line, including 19.0% of those under age 18 and 10.7% of those age 65 or over.

Communities

Cities

Villages

Unincorporated communities

Education

School districts include:

K-12:

  • Century Community Unit School District 100
  • Goreville Community Unit School District 1
  • Marion Community Unit School District 2

Secondary:

  • Vienna High School District 133

Elementary:

  • Buncombe Consolidated School District 43
  • Cypress School District 64
  • New Simpson Hill Consolidated District 32
  • Vienna School District 55

See also

Kids robot.svg In Spanish: Condado de Johnson (Illinois) para niños

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