| Zip Code : | 53538 |
| City : | Fort Atkinson city, Hebron, Lake Koshkonong |
| County : | Jefferson County, Rock County |
| State : | Wisconsin (WI) |
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| Land Area : | 99.22 sq mi |
| Water Area : | 9.45 sq mi |
| Latitude : | 42.9200460 |
| Longitude : | -88.8571503 |
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| Population (2010): | 18,468 |
| Population Estimate (2012) : | 18,731 |
| Population Density : | 186.13/sq mi |
| Housing Units (2012) : | 8,154 |
| Median Household Income (2012) : | $56,675 (Wisconsin : $52,627, USA : $53,046) |
| Median Family Income (2012) : | $67,952 (Wisconsin : $66,415, USA : $64,585) |
| Median House Price (2012) : | $176,300 (Wisconsin : $169,000, USA : $181,400) |