St. Charles County, Missouri demographics
Population: 402,377
Median age: 39.2
Median household income: 91,792
Demographics, population, home values, social and economic characteristics of St. Charles County, Missouri.
Population
| 2021 | 402,377 |
| 2020 | 398,472 |
| 2019 | 394,290 |
| 2018 | 389,985 |
| 2017 | 385,115 |
| 2016 | 379,856 |
| 2015 | 374,805 |
| 2014 | 369,781 |
| 2013 | 365,101 |
| 2012 | 360,695 |
| 2011 | 356,070 |
| 2010 | 350,606 |
| 2009 | 342,562 |
St. Charles County, MO cities
Augusta town - 276
Cottleville city - 5,408
Dardenne Prairie city - 12,689
Defiance CDP - 51
Flint Hill city - 1,006
Foristell city - 849
Josephville village - 701
Lake St. Louis city - 16,665
New Melle city - 382
O'Fallon city - 90,802
Portage Des Sioux city - 361
St. Charles city - 70,218
St. Paul city - 2,992
St. Peters city - 57,289
Weldon Spring city - 5,348
Weldon Spring Heights town - 124
Wentzville city - 43,213
West Alton city - 448
Census data for St. Charles County, Missouri
Demographic and housing estimates in St. Charles County, Missouri
| Total population | 402,377 |
| Male | 198,886 |
| Female | 203,491 |
| Total population | 402,377 |
| Under 5 years | 23,126 |
| 5 to 9 years | 26,302 |
| 10 to 14 years | 27,505 |
| 15 to 19 years | 26,402 |
| 20 to 24 years | 23,759 |
| 25 to 34 years | 50,823 |
| 35 to 44 years | 55,397 |
| 45 to 54 years | 52,131 |
| 55 to 59 years | 28,553 |
| 60 to 64 years | 26,665 |
| 65 to 74 years | 37,355 |
| 75 to 84 years | 17,926 |
| 85 years and over | 6,433 |
| Median age (years) | 39.2 |
| Under 18 years | 93,754 |
| 16 years and over | 319,400 |
| 18 years and over | 308,623 |
| 21 years and over | 294,320 |
| 62 years and over | 76,975 |
| 65 years and over | 61,714 |
| Total population | 402,377 |
| One race | 386,208 |
| White | 352,890 |
| Black or African American | 18,583 |
| American Indian and Alaska Native | 332 |
| Asian | 10,806 |
| Native Hawaiian and Other Pacific Islander | 128 |
| Some other race | 3,469 |
| Two or more races | 16,169 |
| Citizen, VOTING AGE 18 and over population | 301,752 |
| Male Citizen, VOTING AGE 18 and over population | 147,563 |
| Female Citizen, VOTING AGE 18 and over population | 154,189 |
Social characteristics in St. Charles County, Missouri
| Total households | 153,164 |
| Family households (families) | 89,603 |
| Married-couple family | 9,389 |
| Male householder, no wife present, family | 21,516 |
| Female householder, no husband present, family | 15,340 |
| Nonfamily households | 32,656 |
| Average household size | 43,166 |
| Average family size | 2.58 |
Economic characteristics in St. Charles County, Missouri
| Total households | 153,164 |
| Less than $10,000 | 3,385 |
| $10,000 to $14,999 | 2,416 |
| $15,000 to $24,999 | 6,774 |
| $25,000 to $34,999 | 8,057 |
| $35,000 to $49,999 | 15,244 |
| $50,000 to $74,999 | 24,829 |
| $75,000 to $99,999 | 23,445 |
| $100,000 to $149,999 | 34,490 |
| $150,000 to $199,999 | 17,738 |
| $200,000 or more | 16,786 |
| Median household income (dollars) | 91,792 |
Housing characteristics in St. Charles County, Missouri
| Total housing units | 159,589 |
| Occupied housing units | 153,164 |
| Vacant housing units | 6,425 |
| Total housing units | 159,589 |
| 1-unit, detached | 119,896 |
| 1-unit, attached | 12,197 |
| 2 units | 1,698 |
| 3 or 4 units | 3,972 |
| 5 to 9 units | 5,181 |
| 10 to 19 units | 6,125 |
| 20 or more units | 5,872 |
| Mobile home | 4,589 |
| Boat, RV, van, etc. | 59 |
| Total housing units | 159,589 |
| Built 2014 or later | 860 |
| Built 2010 to 2013 | 19,743 |
| Built 2000 to 2009 | 35,976 |
| Built 1990 to 1999 | 33,576 |
| Built 1980 to 1989 | 26,821 |
| Built 1970 to 1979 | 20,324 |
| Built 1960 to 1969 | 11,286 |
| Built 1950 to 1959 | 6,046 |
| Built 1940 to 1949 | 1,497 |
| Built 1939 or earlier | 3,460 |
| Total housing units | 159,589 |
| 1 room | 1,632 |
| 2 rooms | 2,080 |
| 3 rooms | 7,408 |
| 4 rooms | 18,087 |
| 5 rooms | 28,180 |
| 6 rooms | 26,766 |
| 7 rooms | 21,786 |
| 8 rooms | 20,962 |
| 9 rooms or more | 32,688 |
| Median rooms | 6.3 |
| Total housing units | 159,589 |
| No bedroom | 1,729 |
| 1 bedroom | 7,769 |
| 2 bedrooms | 28,334 |
| 3 bedrooms | 70,574 |
| 4 bedrooms | 43,284 |
| 5 or more bedrooms | 7,899 |
| Occupied housing units | 153,164 |
| Owner-occupied | 124,303 |
| Renter-occupied | 28,861 |
| Average household size of owner-occupied unit | 2.69 |
| Average household size of renter-occupied unit | 2.11 |
| Occupied housing units | 153,164 |
| Moved in 2017 or later | 14,770 |
| Moved in 2015 to 2016 | 42,583 |
| Moved in 2010 to 2014 | 25,208 |
| Moved in 2000 to 2009 | 36,930 |
| Moved in 1990 to 1999 | 21,149 |
| Moved in 1989 and earlier | 12,524 |
| Owner-occupied units | 124,303 |
| Less than $50,000 | 4,425 |
| $50,000 to $99,999 | 2,826 |
| $100,000 to $149,999 | 10,469 |
| $150,000 to $199,999 | 23,230 |
| $200,000 to $299,999 | 44,696 |
| $300,000 to $499,999 | 31,221 |
| $500,000 to $999,999 | 6,634 |
| $1,000,000 or more | 802 |
| Median (dollars) | 242,700 |
| Owner-occupied units | 124,303 |
| Housing units with a mortgage | 89,667 |
| Housing units without a mortgage | 34,636 |
| Occupied units paying rent | 27,520 |
| Less than $500 | 1,136 |
| $500 to $999 | 8,872 |
| $1,000 to $1,499 | 12,402 |
| $1,500 to $1,999 | 3,842 |
| $2,000 to $2,499 | 621 |
| $2,500 to $2,999 | 217 |
| $3,000 or more | 430 |
| Median (dollars) | 1,118 |
| No rent paid | 1,341 |
Demographic data for St. Charles County, MO and each city in the county. Lists of cities by population, wealth and poverty in St. Charles County, MO.
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