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Kansas Counties

Johnson County, Kansas

Date Established: August 25, 1855
Date Organized:
Location: Kansas map showing location of Johnson County
County Seat: Olathe
Origin of Name: In honor of the Rev. Thomas Johnson (1802-1865), who established a mission to the Shawnee Indians in 1829 (Shawnee Indian Mission in present-day Fairway, Johnson Co.).
Cities & Townships
PlacePopulation (2020 census)
Aubry Township  4,650 
Bonner Springs (city)  0 
Countryside (city)  (Defunct)  
De Soto (city)  6,118 
Edgerton (city)  1,748 
Fairway (city)  4,170 
Gardner (city)  23,287 
Gardner Township  2,593 
Lake Quivira (city)  961 
Leawood (city)  33,902 
Lenexa (city)  57,434 
Lexington Township  1,497 
McCamish Township  980 
Merriam (city)  11,098 
Mission (city)  9,954 
Mission Hills (city)  3,594 
Mission Township  (Defunct)  
Mission Woods (city)  203 
Monticello Township  (Defunct)  
Olathe (city)  141,290 
Olathe Township  894 
Overland Park (city)  197,238 
Oxford Township  2,027 
Prairie Village (city)  22,957 
Roeland Park (city)  6,871 
Shawnee (city)  67,311 
Shawnee Township  (Defunct)  
Spring Hill (city)  4,932 
Spring Hill Township  2,004 
Westwood (city)  1,750 
Westwood Hills (city)  400 
Total population: 609,863 

Township map of Johnson County, 2000
Population:
1860 (4,364)
1870 (13,684)
1880 (16,853)
1890 (17,385)
1900 (18,104)
1910 (18,288)
1920 (18,314)
1930 (27,179)
1940 (33,327)
1950 (62,783)
1960 (143,792)
1970 (217,662)
1980 (270,269)
1990 (355,054)
2000 (451,086)
2010 (544,179)
2020 (609,863)
Other Maps: Township map, 1940
Other Resources: Post offices in Johnson County
Cemeteries in Johnson County, As of 1906
Newspapers Available on Microfilm
Townships and Independent Cities in Johnson County
Bibliography
Kansas Memory
Links to Other Sites: Johnson County GenWeb
Early Kansas Maps [KanColl]
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