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Jefferson County

Aztalan Cambridge Cold Spring Concord Farmington Fort Atkinson Hebron Hebron Helenville Ixonia Ixonia Jefferson Jefferson Jefferson Johnson Creek Koshkonong Lake Koshkonong Lake Lac La Belle Lake Mills Lake Ripley Milford Oakland Oakland Palmyra Portland Portland Rome Rome Sullivan Sullivan Waterloo Waterloo Watertown Watertown

Map of Wisconsin HASC code : US-WI-JE FIPS 6-4 code : 55055 Capital : Jefferson Largest city : Watertown Elevation : High : Farmington 872 ft Low : Lake Koshkonong 0 ft Population : 74,021 Land Area : 557 sq mi (1,443 km²) Density : 132.89/sq mi (51.31/km²) Time zone : UTC -6 Website : http://www.co.jefferson.wi.us