Johnson County, Indiana facts for kids

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Johnson County, Indiana
Map
Map of Indiana highlighting Johnson County
Location in the state of Indiana
Map of the USA highlighting Indiana
Indiana's location in the U.S.
Statistics
Founded 1823
Seat Franklin
Largest City Greenwood
Area
 - Total
 - Land
 - Water

321.79 sq mi (833 km²)
320.43 sq mi (830 km²)
1.36 sq mi (4 km²), 0.42%
Population
 - (2010)
 - Density

139,654
436/sq mi (168.4/km²)
Time zone Eastern: UTC-5/-4
Website: www.co.johnson.in.us
Indiana county number 41

Johnson County is a county located in the U.S. state of Indiana. As of 2010, the population was 139,654. The county seat is Franklin.

Johnson County is included in the Indianapolis-Carmel-Anderson, IN Metropolitan Statistical Area.

Transportation

Major Highways

  • I-65.svg Interstate 65
  • I-69.svg Interstate 69 ^
  • US 31.svg U.S. Route 31
  • Indiana 37.svg State Road 37
  • Indiana 44.svg State Road 44
  • Indiana 135.svg State Road 135
  • Indiana 144.svg State Road 144
  • Indiana 252.svg State Road 252

^ Being constructed along route of Indiana 37

Airport

  • KHFY - Greenwood Municipal Airport

Geography

According to the 2010 census, the county has a total area of 321.79 square miles (833.4 km2), of which 320.43 square miles (829.9 km2) (or 99.58%) is land and 1.36 square miles (3.5 km2) (or 0.42%) is water.

Adjacent counties

History

Johnson County was formed in 1823. It was named for John Johnson, a judge of the Indiana Supreme Court. This is probably John Johnson of Knox County, delegate to the State constitutional convention, appointed to the Supreme Court in 1816.

Cities and towns

Extinct

Townships

  • Blue River
  • Clark
  • Franklin
  • Hensley
  • Needham
  • Nineveh
  • Pleasant
  • Union
  • White River

The south end of the county is also home to the Camp Atterbury military installation.

Climate and weather

Weather chart for Franklin, Indiana
J F M A M J J A S O N D
 
 
2.1
 
33
18
 
 
2.1
 
39
22
 
 
3.1
 
50
31
 
 
3.8
 
61
41
 
 
4.6
 
72
52
 
 
4.1
 
81
61
 
 
4.8
 
84
65
 
 
3.9
 
82
63
 
 
2.6
 
76
55
 
 
2.9
 
65
43
 
 
3.7
 
51
34
 
 
2.8
 
39
23
temperatures in °F
precipitation totals in inches
source: The Weather Channel

In recent years, average temperatures in Franklin have ranged from a low of 18 °F (−8 °C) in January to a high of 84 °F (29 °C) in July, although a record low of −22 °F (−30 °C) was recorded in January 1985 and a record high of 104 °F (40 °C) was recorded in June 1988. Average monthly precipitation ranged from 2.05 inches (52 mm) in January to 4.78 inches (121 mm) in July. The coldest temperature ever recorded in Indiana was in the town of New Whiteland, Indiana on January 19, 1994 when the temperature reached −36 °F (−38 °C).

Demographics

Historical population
Census Pop.
1830 4,019
1840 9,352 132.7%
1850 12,101 29.4%
1860 14,854 22.8%
1870 18,366 23.6%
1880 19,537 6.4%
1890 19,561 0.1%
1900 20,223 3.4%
1910 20,394 0.8%
1920 20,739 1.7%
1930 21,706 4.7%
1940 22,493 3.6%
1950 26,183 16.4%
1960 43,704 66.9%
1970 61,138 39.9%
1980 77,240 26.3%
1990 88,109 14.1%
2000 115,209 30.8%
2010 139,654 21.2%
Est. 2015 149,633 7.1%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2010-2013

As of the 2010 United States Census, there were 139,654 people, 52,242 households, and 37,711 families residing in the county. The population density was 435.8 inhabitants per square mile (168.3/km2). There were 56,649 housing units at an average density of 176.8 per square mile (68.3/km2). The racial makeup of the county was 93.9% white, 2.0% Asian, 1.1% black or African American, 0.2% American Indian, 1.2% from other races, and 1.5% from two or more races. Those of Hispanic or Latino origin made up 3.1% of the population. In terms of ancestry, 28.1% were German, 15.7% were Irish, 11.5% were English, and 10.3% were American.

Of the 52,242 households, 37.1% had children under the age of 18 living with them, 57.3% were married couples living together, 10.2% had a female householder with no husband present, 27.8% were non-families, and 22.6% of all households were made up of individuals. The average household size was 2.63 and the average family size was 3.09. The median age was 36.8 years.

The median income for a household in the county was $47,697 and the median income for a family was $72,723. Males had a median income of $52,107 versus $36,029 for females. The per capita income for the county was $28,224. About 5.9% of families and 8.1% of the population were below the poverty line, including 11.1% of those under age 18 and 4.8% of those age 65 or over.


Johnson County, Indiana Facts for Kids. Kiddle Encyclopedia.