County
· Wisconsin
Jefferson County
Jefferson County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 84,900. Its county seat is Jefferson. Jefferson County comprises the Watertown-Fort Atkinson, WI Micropolitan Statistical Area, which is also included in the Milwaukee-Racine-Waukesha, WI Combined Statistical Area.
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Cities and towns 8
Townships 16
- Town of Aztalan pop. 1,369
- Town of Cold Spring pop. 729
- Town of Concord pop. 1,980
- Town of Farmington pop. 1,406
- Town of Hebron pop. 1,037
- Town of Ixonia pop. 5,098
- Town of Jefferson pop. 2,054
- Town of Koshkonong pop. 3,747
- Town of Lake Mills pop. 2,193
- Town of Milford pop. 1,099
- Town of Oakland pop. 3,213
- Town of Palmyra pop. 1,213
- Town of Sullivan pop. 2,290
- Town of Sumner pop. 842
- Town of Waterloo pop. 864
- Town of Watertown pop. 1,922
Reference data (Census of Governments 2022)
- Census ID (PID6)
- 177064
- FIPS state
- 55
- FIPS county
- 055
- FIPS place
- 99055
- Census record name
- COUNTY OF JEFFERSON
- Mailing address
- 311 S CENTER AVE, JEFFERSON 53549