Population.us > Settlements > Missouri > O'Fallon city

Population of O'Fallon, MO

Last official estimated population of O'Fallon city (St. Charles County**, Missouri state) was 84,009 (year 2014)[1]. This was 0.026% of total US population and 1.38% of total Missouri state population. Area of O'Fallon city is 29.7 mi² (=76.9 km²)[6], in this year population density was 2,829.06 p/mi². If population growth rate would be same as in period 2010-2014 (+1.44%/yr), O'Fallon city population in 2022 would be 94,214*.


Historical population

Historical population of O'Fallon city for period 1880-2014:

O'Fallon city on population map

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

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Annual growth rate

[1880-1920] +1.74 %/yr
[1920-1930] +0.1 %/yr
[1930-1940] +0.4 %/yr
[1940-1950] +2.47 %/yr
[1950-1960] +16.93 %/yr
[1960-1970] +6.41 %/yr
[1970-1980] +2.14 %/yr
[1980-1990] +7.75 %/yr
[1990-2000] +10.41 %/yr
[2000-2005] +6.03 %/yr
[2005-2010] +3.74 %/yr
[2010-2014] +1.44 %/yr

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Settlements near O'Fallon city

St. Peters city population 5.9 mi, 89°
Wentzville city 8.7 mi, 285°
Lake St. Louis city 3.8 mi, 268°
Dardenne Prairie city 2.1 mi, 202°
Weldon Spring city 6.1 mi, 146°
Cottleville city 3.8 mi, 125°
St. Paul city 4.6 mi, 342°
New Melle city 9.9 mi, 243°
Josephville village 5 mi, 309°
Weldon Spring Heights town 5.7 mi, 163°


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

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