Last official estimated population of Alton city (Sioux County**, Iowa state) was 1,256 (year 2014)[1]. This was 0% of total US population and 0.04% of total Iowa state population. Area of Alton city is 1.8 mi² (=4.8 km²)[6], in this year population density was 680.39 p/mi². If population growth rate would be same as in period 2010-2014 (+0.81%/yr), Alton city population in 2026 would be 1,384*.
Historical population of Alton city for period 1890-2014:
Estimated population for 2014[1]. Click on flag to hide it.
Population • Legends • Position
[1890-1900] +3.61 %/yr
[1900-1910] +0.36 %/yr
[1910-1920] -0.38 %/yr
[1920-1930] +0.07 %/yr
[1930-1940] +0.11 %/yr
[1940-1950] +0.13 %/yr
[1950-1960] +0.1 %/yr
[1960-1970] -0.29 %/yr
[1970-1980] -0.32 %/yr
[1980-1990] +1.44 %/yr
[1990-2000] -0.19 %/yr
[2000-2005] +0.71 %/yr
[2005-2010] +1 %/yr
[2010-2014] +0.81 %/yr
• Sioux Center city population
10.1 mi, 
306°
• Orange City city
2.6 mi, 
292°
• Remsen city
12.1 mi, 
171°
• Marcus city
15.3 mi, 
138°
• Hospers city
7.9 mi, 
42°
• Boyden city
13.9 mi, 
1°
• Granville city
6.8 mi, 
91°
• Maurice city
8.8 mi, 
259°
• Oyens city
11.8 mi, 
192°
• Struble city
11.4 mi, 
235°
*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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