Johnson County, Illinois facts for kids

Kids Encyclopedia Facts
Johnson County, Illinois
Map

Location in the state of Illinois
Map of the USA highlighting Illinois
Illinois's location in the U.S.
Statistics
Founded 1812
Seat Vienna
Largest City Vienna
Area
 - Total
 - Land
 - Water

349 sq mi (904 km²)
344 sq mi (891 km²)
4.9 sq mi (13 km²), 1.4%
Population
 - (2010)
 - Density

12,582
37/sq mi (14/km²)
Time zone Central: UTC-6/-5
Named for: Richard Mentor Johnson

Johnson County is a county located in the U.S. state of Illinois. According to the 2010 census, it has a population of 12,582. 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 M. 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 be Vice President of the United States.

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

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

Adjacent counties

National protected areas

  • Cypress Creek National Wildlife Refuge (part)
  • Shawnee National Forest (part)

Demographics

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.
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%
Est. 2015 12,762 1.4%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2010-2013

2010

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

  • 89.0% White
  • 8.0% Black
  • 0.2% Native American
  • 0.2% Asian
  • 0.0% Native Hawaiian or Pacific Islander
  • 1.0% Two or more races
  • 1.6% Other races
  • 3.0% Hispanic or Latino (of any race)

2000

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. 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

City

Villages

Unincorporated communities


Johnson County, Illinois Facts for Kids. Kiddle Encyclopedia.