Geo quick facts: Jefferson County is a county located in the U.S. state of Kansas. At the 2010 census, the county population was 19,126. Its county seat is Oskaloosa, and its most populous city is Valley Falls – Wikipedia.
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Geo quick facts: Jefferson County is a county located in the U.S. state of Kansas. At the 2010 census, the county population was 19,126. Its county seat is Oskaloosa, and its most populous city is Valley Falls – Wikipedia.
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