| Zip Code : | 53545 |
| City : | Janesville city |
| County : | Rock County |
| State : | Wisconsin (WI) |
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| Land Area : | 24.78 sq mi |
| Water Area : | 0.43 sq mi |
| Latitude : | 42.7388881 |
| Longitude : | -89.0403004 |
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| Population (2010): | 23,117 |
| Population Estimate (2012) : | 22,703 |
| Population Density : | 933.05/sq mi |
| Housing Units (2012) : | 10,484 |
| Median Household Income (2012) : | $48,444 (Wisconsin : $52,627, USA : $53,046) |
| Median Family Income (2012) : | $60,733 (Wisconsin : $66,415, USA : $64,585) |
| Median House Price (2012) : | $135,300 (Wisconsin : $169,000, USA : $181,400) |