Johnson County

Johnson County (county code JO) is a county located in northeast Kansas, in the central United States. The county's population—the fastest growing in the state of Kansas—was 451,086 at the 2000 census, and it was estimated to be 534,093 in the year 2008, making it the largest in the state. Its county seat is Olathe, and its most populous city is Overland Park. Johnson County has the highest median household income in the state and 19th in the nat... more

Area:

  • 1,243.19429 km² (480 mi² )

Population:

  • 451,086 (2000)

Date founded:

  • Aug 25, 1855

Location

Population

number date
  • 516,731
  • 451,086
  • 2000
  • 18,288
  • 1910
  • 18,314
  • 1920
  • 4,364
  • 1860
  • 18,104
  • 1900
  • 357,048
  • 1990
  • 62,783
  • 1950
  • 33,327
  • 1940
  • 21,179
  • 1930

County Seat:

CO2 emissions - total:

Emissions Date
  • 1.18994 ppm
  • 2007

CO2 emissions - residential:

Emissions Date
  • 0.20119 ppm
  • 2007

CO2 emissions - commercial:

Emissions Date
  • 0.14518 ppm
  • 2007

CO2 emissions - industrial:

Emissions Date
  • 0.13677 ppm
  • 2007

CO2 emissions - mobile:

Emissions Date
  • 0.70672 ppm
  • 2007

50th percentile rent - 0 br:

Currency Amount Valid Date
  • 573
  • 2009

50th percentile rent - 1 br:

Currency Amount Valid Date
  • 689
  • 2009

50th percentile rent - 2 br:

Currency Amount Valid Date
  • 791
  • 2009

50th percentile rent - 3 br:

Currency Amount Valid Date
  • 1,070
  • 2009

50th percentile rent - 4 br:

Currency Amount Valid Date
  • 1,126
  • 2009

Household Count:

number date
  • 174,631
  • 2008

Estimated Number of Foreclosures:

number date
  • 3,682
  • 2008

Estimated Number of Mortgages:

number date
  • 180,171
  • 2008

90-Day Vacant Residential Addresses:

number date
  • 3,353
  • 2008

Total Residential Addresses:

number date
  • 217,610
  • 2008

BLS Unemployment Rate (%):

Date Number
  • 2008
  • 0.0444

OFHEO Price Change (%):

  • 2008

Geolocation:

Latitude Longitude
  • 38.9322
  • -94.7538
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