Last official estimated population of Mason City city (Mason County**, Illinois state) was 2,212 (year 2014)[1]. This was 0.001% of total US population and 0.02% of total Illinois state population. Area of Mason City city is 1.0 mi² (=2.6 km²)[6], in this year population density was 2,181.46 p/mi². If population growth rate would be same as in period 2010-2014 (-1.43%/yr), Mason City city population in 2026 would be 1,861*.
Historical population of Mason City city for period 1860-2014:
Estimated population for 2014[1]. Click on flag to hide it.
Population • Legends • Position
[1860-1870] +19.86 %/yr
[1870-1880] +0.6 %/yr
[1880-1890] +0.87 %/yr
[1890-1900] +0.11 %/yr
[1900-1910] -0.26 %/yr
[1910-1920] +0.2 %/yr
[1920-1930] +0.32 %/yr
[1930-1940] +0.22 %/yr
[1940-1950] +0.1 %/yr
[1950-1960] +0.75 %/yr
[1960-1970] +1.91 %/yr
[1970-1980] +0.41 %/yr
[1980-1990] -1.06 %/yr
[1990-2000] +0.33 %/yr
[2000-2005] -0.58 %/yr
[2005-2010] -0.93 %/yr
[2010-2014] -1.43 %/yr
• Delavan city population
14.1 mi, 
34°
• Greenview village
8.4 mi, 
195°
• Green Valley village
14.4 mi, 
11°
• San Jose village
8.7 mi, 34°
• Emden village
13 mi, 
59°
• Middletown village
9 mi, 
141°
• Hartsburg village
13.9 mi, 
76°
• Easton village
7.9 mi, 
285°
• New Holland village
6.2 mi, 
102°
• Forest City village
13.7 mi, 
328°
*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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