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Johnson County is a county in the U.S. state of Kansas, along the border of the state of Missouri. Its county seat is Olathe. As of the 2020 census, the population was 609,863, the most populous county in Kansas. The county was named after Thomas Johnson, a Methodist missionary who was one of the state's first settlers.
JoCoHistory is a collaborative presentation of the history from the Johnson County Museum, Johnson County Library and fellow JoCoHistory partners. Explore historical photographs and documents about the people, places and organizations of Johnson County, Kansas, from the 19th century to the present.
Johnson County is the largest county by population, with approximately 560,000 (2012). The Santa Fe, Oregon, and California trails ran through the county. A campground, the Lone Elm Campground Swale, is on the National Register of Historic Places.
Johnson County, Kansas has 473.6 square miles of land area and is the 99th largest county in Kansas by total area. Topics in the Johnson County, Kansas data profile include: Populations and People; Income and Poverty; Education; Employment; Housing; Health; Business and Economy; Families and Living Arrangements; Race and Ethnicity.
Johnson County, KS Government, Olathe, Kansas. 21,025 likes · 296 talking about this. Official Page-Johnson County, KS Govt....
Jul 1, 2022 · Johnson County, Kansas. QuickFacts provides statistics for all states and counties. Also for cities and towns with a population of 5,000 or more.
Johnson County (county code JO) is a county in northeast Kansas. The county is part of the Kansas City metropolitan area. It contains many of the richer suburbs of Kansas City. As of the 2020 census, 609,863 people lived there. Its county seat is Olathe. The most populous city is Overland Park.
