Last official estimated population of Waterloo city (Black Hawk County**, Iowa state) was 68,364 (year 2014)[1]. This was 0.021% of total US population and 2.19% of total Iowa state population. Area of Waterloo city is 63.2 mi² (=163.8 km²)[6], in this year population density was 1,081.26 p/mi². If population growth rate would be same as in period 2010-2014 (-0.02%/yr), Waterloo city population in 2024 would be 68,259*.
Historical population of Waterloo city for period 1870-2014:
Estimated population for 2014[1]. Click on flag to hide it.
Population • Legends • Position
[1870-1880] +2.64 %/yr
[1880-1890] +1.72 %/yr
[1890-1900] +6.54 %/yr
[1900-1910] +7.81 %/yr
[1910-1920] +3.1 %/yr
[1920-1930] +2.46 %/yr
[1930-1940] +1.14 %/yr
[1940-1950] +2.34 %/yr
[1950-1960] +0.96 %/yr
[1960-1970] +0.51 %/yr
[1970-1980] +0.06 %/yr
[1980-1990] -1.29 %/yr
[1990-2000] +0.3 %/yr
[2000-2005] -0.39 %/yr
[2005-2010] +0.29 %/yr
[2010-2014] -0.02 %/yr
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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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