Population.us

Population of Janesville, IA

Last official estimated population of Janesville city (Black Hawk County**, Iowa state) was 947 (year 2014)^[1]. This was 0% of total US population and 0.03% of total Iowa state population. Area of Janesville city is 1.5 mi² (=3.9 km²)^[6], in this year population density was 635.57 p/mi². If population growth rate would be same as in period 2010-2014 (+0.45%/yr), Janesville city population in 2026 would be 1,000*.

Historical population

Historical population of Janesville city for period 1880-2014:

Janesville city on population map

Estimated population for 2014^[1]. Click on flag to hide it.

Population • Legends • Position

Settlements near Janesville city

• Waterloo city population 12 mi, 152°
• Cedar Falls city 8.7 mi, 176°
• Waverly city 5.3 mi, 356°
• Hudson city 14.6 mi, 177°
• Denver city 6.8 mi, 75°
• Clarksville city 13.9 mi, 311°
• Shell Rock city 7.6 mi, 307°
• Readlyn city 12.7 mi, 71°
• New Hartford city 9.8 mi, 236°
• Plainfield city 14.2 mi, 344°

Sources, notices

*Calculated by population.us from last known population growth rate, not official data.

**Some cities are placed on more than one county. Only 1 county is shown.

[1] Cities and Towns (Incorporated Places and Minor Civil Divisions) 2014, archived from the original, retrieved 02/23/2016

[2] City and Town Intercensal Estimates (2000-2010), archived from the original, retrieved 02/23/2016

[3] Places: 1990 and 1999 Populations, With Numeric and Percent Population Change, archived from the original, retrieved 02/23/2016

[4] Population of the 100 Largest Urban Places: 1980,

[5] Population of the 100 Largest Urban Places in history,

[6] Area, latitude longitude data, retrieved 02/23/2016

[7] Through the Decades, Overview 1790-2010, PDF, large files! >100 Mb