Last official estimated population of Hartwick city (Poweshiek County**, Iowa state) was 85 (year 2014)[1]. This was 0% of total US population and 0% of total Iowa state population. Area of Hartwick city is 0.1 mi² (=0.3 km²)[6], in this year population density was 634.33 p/mi². If population growth rate would be same as in period 2010-2014 (-0.29%/yr), Hartwick city population in 2025 would be 82*.
Historical population of Hartwick city for period 1920-2014:
Estimated population for 2014[1]. Click on flag to hide it.
Population • Legends • Position
[1920-1930] +1.32 %/yr
[1930-1940] 0 %/yr
[1940-1950] -1.3 %/yr
[1950-1960] +1.65 %/yr
[1960-1970] -2.19 %/yr
[1970-1980] -0.93 %/yr
[1980-1990] +2.26 %/yr
[1990-2000] -3.21 %/yr
[2000-2005] +0.48 %/yr
[2005-2010] +0.23 %/yr
[2010-2014] -0.29 %/yr
• Marengo city population
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*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
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