Jefferson County is situated in the southeastern part of Iowa. This hilarious county is named after Thomas Jefferson, US President. The total area of Jefferson County is about 435 square miles. This county, set up on Jan 21, 1839, is populated today by at least 16 thousand residents. Fairfield is the county seat of Jefferson County. This map shows the borders of Jefferson County as well as neighboring counties, including major highways and natural objecsts as of 2025. Zoom in or out of the map using the plus/minus panel. Move the center of this map by dragging it. Also check out the satellite map of Jefferson County.
The borders of Jefferson County over the map of Iowa
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