| City : | Janesville City |
| County : | Black Hawk County, Bremer County |
| State : | Iowa (IA) |
| Land Area : | 1.44 sq mi |
| Water Area : | 0.05 sq mi |
| Latitude : | 42.6458052 |
| Longitude : | -92.4623969 |
| Population (2010): | 930 |
| Population Estimate (2012) : | 986 |
| Population Density : | 647.65/sq mi |
| Housing Units (2012) : | 409 |
| Median Household Income (2012) : | $53,102 (Iowa : $51,129, USA : $53,046) |
| Median Family Income (2012) : | $63,750 (Iowa : $64,772, USA : $64,585) |
| Median House Price (2012) : | $120,800 (Iowa : $123,000, USA : $181,400) |
Janesville City Zip Codes
| 50647 (1,894) |