Johnson County, Indiana facts for kids
Quick facts for kids
Johnson County
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Johnson County courthouse in Franklin, Indiana
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Location within the U.S. state of Indiana
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 Indiana's location within the U.S. |
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| Country |  United States |
| State |  Indiana |
| Founded | 1823 |
| Seat | Franklin |
| Largest city | Greenwood |
| Area | |
| • Total | 321.79 sq mi (833.4 km2) |
| • Land | 320.43 sq mi (829.9 km2) |
| • Water | 1.36 sq mi (3.5 km2) 0.42%% |
| Population
(2020)
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| • Total | 161,765 |
| • Estimate
(2023)
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167,819  |
| • Density | 502.704/sq mi (194.095/km2) |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Congressional district | 6th |
| Indiana county number 41 | |
Johnson County is a county located in the U.S. state of Indiana. As of 2020, the population was 161,765. The county seat is Franklin. Johnson County is included in the Indianapolis-Carmel-Anderson, IN Metropolitan Statistical Area.
Contents
Transportation
Transit
- Access Johnson County
Major highways
Interstate 65
Interstate 69
U.S. Route 31
State Road 44
State Road 135
State Road 144
State Road 252
Airport
- KHFY - Greenwood Municipal Airport
- 3FK - Franklin Flying Field
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
- Marion County (north)
- Shelby County (east)
- Bartholomew County (southeast)
- Brown County (southwest)
- Morgan County (west)
History
Johnson County was formed in 1823. It was named for John Johnson, a Justice 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
- Farwest
Townships
- Blue River
- Clark
- Franklin-Union-Needham, which merged in January 2022
- Hensley
- Nineveh
- Pleasant
- 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 | |||||||||||||||||||||||||||||||||||||||||||||||
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| J | F | M | A | M | J | J | A | S | O | N | D | ||||||||||||||||||||||||||||||||||||
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3.1
36
21
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2.4
41
24
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3.7
52
34
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4.3
64
43
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4.8
73
54
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5
82
63
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4.4
86
66
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3.2
84
65
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3.1
78
57
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3.2
66
46
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3.5
52
35
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2.9
40
26
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| temperatures in °F precipitation totals in inches source: The Weather Channel |
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Metric conversion
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In recent years, average temperatures in Franklin have ranged from a low of 21 °F (−6 °C) in January to a high of 86 °F (30 °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 | |||
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| 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% | |
| 2020 | 161,765 | 15.8% | |
| 2023 (est.) | 167,819 | 20.2% | |
| U.S. Decennial Census 1790–1960 1900–1990 1990–2000 2010–2020 |
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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.
Education
School districts include:
- Center Grove Community School Corporation
- Clark-Pleasant Community School Corporation
- Edinburgh Community School Corporation
- Franklin Community School Corporation
- Greenwood Community School Corporation
- Nineveh-Hensley-Jackson United School Corporation
See also
In Spanish: Condado de Johnson (Indiana) para niños
