Jefferson County was formed in the year 1855 and is located in northeast Kansas, in the Central United States. The area covered by the county is 556.94 sq mi. More than 18K people with a splendid mixture of races including White, Native American, black or African American, Asian, Hispanic or Latino, Pacific Islander, and others along with 6.8K households and 5.1K family units reside in this region. Oskaloosa is the county seat and Valley Falls is the largest city.

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