Janesville, Iowa

Janesville is a city in Black Hawk and Bremer counties in the U.S. state of Iowa. The population was 1034 at the 2020 census. It is part of the WaterlooCedar Falls Metropolitan Statistical Area.

Janesville, Iowa
Downtown Janesville
Nickname: 
Oldest City in Bremer County
Location of Janesville, Iowa
Coordinates: 42°38′46″N 92°27′46″W
Country United States
State Iowa
CountiesBremer, Black Hawk
Government
  TypeCity Council
  MayorSandi Carroll
Area
  Total1.47 sq mi (3.81 km2)
  Land1.41 sq mi (3.66 km2)
  Water0.06 sq mi (0.15 km2)
Elevation
906 ft (276 m)
Population
 (2020)
  Total1,034
  Density731.26/sq mi (282.39/km2)
Time zoneUTC-6 (Central (CST))
  Summer (DST)UTC-5 (CDT)
ZIP code
50647
Area code319
FIPS code19-39405
GNIS feature ID0457912
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