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Kansas Counties

Jefferson County, Kansas

Date Established: August 25, 1855
Date Organized:
Location: Kansas map showing location of Jefferson County
County Seat: Oskaloosa
Origin of Name: In honor of Thomas Jefferson (1743-1826), the author of the Declaration of Independence and the third president of the United States.
Cities & Townships
PlacePopulation (2020 census)
Delaware Township  1,802 
Fairview Township  1,622 
Jefferson Township  1,090 
Kaw Township  1,390 
Kentucky Township  1,557 
Norton Township  859 
Oskaloosa Township  2,167 
Ozawkie Township  1,628 
Rock Creek Township  2,801 
Rural Township  776 
Sarcoxie Township  986 
Union Township  1,690 
Total population: 18,368 

Township map of Jefferson County, 2000
Population:
1860 (4,459)
1870 (12,526)
1880 (15,563)
1890 (16,620)
1900 (17,533)
1910 (15,826)
1920 (14,750)
1930 (14,129)
1940 (12,718)
1950 (11,084)
1960 (11,252)
1970 (11,945)
1980 (15,207)
1990 (15,905)
2000 (18,426)
2010 (19,126)
2020 (18,368)
Other Resources: Post offices in Jefferson County
Cemeteries in Jefferson County, As of 1906
Newspapers Available on Microfilm
Townships and Independent Cities in Jefferson County
Bibliography
Kansas Memory
Links to Other Sites: Jefferson County GenWeb
Early Kansas Maps [KanColl]
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