Population 414,535 · Census ACS 2020–24
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Population and households in St. Charles County
Household size in St. Charles County
| Period | St. Charles County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.69 | 2.52 | 2.49 | 2.68 |
| 2010–14 | 2.69 | 2.53 | 2.52 | 2.73 |
| 2015–19 | 2.68 | 2.49 | 2.50 | 2.71 |
| 2020–24 | 2.59 | 2.46 | 2.49 | 2.65 |
| Change | −0.10 | −0.06 | −0.00 | −0.03 |
Households in St. Charles County average 2.59 people, about the same as the country as a whole (2.65). The typical household here is bigger than in the St. Louis area as a whole, where it has 2.46 people. Household size has dropped from 2.69 in 2006–10, a much bigger shift than nationally.
Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).
Median age in St. Charles County
| Period | St. Charles County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 36.7 | 38.5 | 38.4 | 37.7 |
| 2010–14 | 38.4 | 39.5 | 39.2 | 38.6 |
| 2015–19 | 39.9 | 40.7 | 40.0 | 39.6 |
| 2020–24 | 40.8 | 40.8 | 40.1 | 40.1 |
| Change | +4.1 | +2.3 | +1.7 | +2.3 |
At 40.8, the median age in St. Charles County is close to the national median of 40.1, so its age mix looks much like the country's. Since 2006–10, the median age has climbed from 36.7, in line with the national trend. The youngest areas are in the northwest, the oldest in the northeast.
Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).
Single-parent households in St. Charles County
| Period | St. Charles County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 8.6% | 11.7% | 11.3% | 12.3% |
| 2010–14 | 9.2% | 11.5% | 11.4% | 12.3% |
| 2015–19 | 8.1% | 11.0% | 10.9% | 11.6% |
| 2020–24 | 8.5% | 11.1% | 11.0% | 11.6% |
| Change | −0.0 pts | −0.6 pts | −0.3 pts | −0.6 pts |
Single-parent households are relatively rare in St. Charles County: 8.5% of households, against 11.6% nationally. Compared with other Missouri counties, St. Charles County has a lower share of single-parent households than most.
Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).
Housing in St. Charles County
Renters in St. Charles County
| Period | St. Charles County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 18.0% | 28.3% | 30.0% | 33.3% |
| 2010–14 | 20.0% | 30.1% | 32.1% | 35.6% |
| 2015–19 | 19.4% | 31.1% | 33.2% | 36.0% |
| 2020–24 | 19.5% | 29.6% | 31.9% | 34.8% |
| Change | +1.4 pts | +1.4 pts | +1.9 pts | +1.5 pts |
St. Charles County is largely a place of homeowners: only 19.5% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. About three in ten owners (29.4%) have paid off their mortgages, well below the national share of 39.8%. The renter share has edged up 1.4 points since 2006–10, as it has nationally.
Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).
Vacant homes in St. Charles County
| Period | St. Charles County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 5.8% | 9.6% | 11.6% | 11.4% |
| 2010–14 | 5.3% | 10.1% | 12.0% | 11.4% |
| 2015–19 | 5.7% | 10.1% | 12.2% | 11.1% |
| 2020–24 | 4.5% | 8.8% | 10.5% | 9.6% |
| Change | −1.3 pts | −0.8 pts | −1.1 pts | −1.8 pts |
Only 4.5% of homes in St. Charles County are vacant, far below the national rate of 9.6%, which usually means strong demand for housing. Vacancy has edged down 1.3 points since 2006–10, in line with the national trend. Only one other Missouri county has a lower vacancy rate.
Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).
Age of homes in St. Charles County
| Period | St. Charles County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 1990 | 1972 | 1974 | 1974 |
| 2010–14 | 1990 | 1972 | 1975 | 1975 |
| 2015–19 | 1991 | 1973 | 1976 | 1977 |
| 2020–24 | 1993 | 1975 | 1978 | 1980 |
| Change | +4 | +3 | +4 | +6 |
St. Charles County has newer housing than the country as a whole: the median home was built in 1993, versus 1980 nationally. The median year built has moved up from 1990 in 2006–10, a sign of steady new building. The newest homes are mostly in the southwest, the oldest in the east. Few Missouri counties have newer homes: only four of 115.
Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).
Rent in St. Charles County
| Period | St. Charles County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | $952 | $825 | $740 | $965 |
| 2010–14 | $1,084 | $920 | $816 | $1,040 |
| 2015–19 | $1,169 | $1,010 | $899 | $1,213 |
| 2020–24 | $1,476 | $1,239 | $1,122 | $1,571 |
| Change | +$524 | +$414 | +$383 | +$606 |
The median renter in St. Charles County pays $1,476 a month for rent and utilities, below the national median of $1,571. Even so, rents here are higher than in the wider St. Louis area ($1,239). Rents are up $524 a month from 2006–10, a 55% rise, a slower climb than the nation's. No other Missouri county has higher rents.
Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).
Education in St. Charles County
Bachelor's degrees in St. Charles County
| Period | St. Charles County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 33.8% | 30.3% | 26.0% | 28.4% |
| 2010–14 | 35.7% | 32.1% | 27.3% | 29.6% |
| 2015–19 | 39.0% | 34.9% | 29.6% | 32.1% |
| 2020–24 | 42.7% | 38.5% | 32.6% | 35.6% |
| Change | +8.9 pts | +8.3 pts | +6.6 pts | +7.2 pts |
Just over four in ten adults 25 and older in St. Charles County (42.7%) have a bachelor's degree or higher, above the national share of 35.6%. Since 2006–10, the share with a degree has risen 8.9 points, in line with the national trend. Of Missouri's 115 counties, only three have a higher share of college graduates.
Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
High school graduates in St. Charles County
| Period | St. Charles County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 92.3% | 88.8% | 86.8% | 84.9% |
| 2010–14 | 93.8% | 90.5% | 88.3% | 86.1% |
| 2015–19 | 94.8% | 92.1% | 90.0% | 87.7% |
| 2020–24 | 95.7% | 93.6% | 91.8% | 89.3% |
| Change | +3.3 pts | +4.8 pts | +5.1 pts | +4.3 pts |
High school completion is high in St. Charles County: 95.7% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. The share with a diploma has risen 3.3 points since 2006–10, as it has nationally. Only one other Missouri county has a higher share of high school graduates.
High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
Jobs in St. Charles County
| Period | St. Charles County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 5.6% | 7.7% | 7.4% | 8.1% |
| 2010–14 | 6.1% | 8.8% | 8.4% | 9.4% |
| 2015–19 | 2.9% | 4.9% | 4.6% | 5.6% |
| 2020–24 | 3.0% | 4.3% | 4.1% | 5.4% |
| Change | −2.6 pts | −3.4 pts | −3.3 pts | −2.7 pts |
The job market in St. Charles County has been strong: just 3.0% of the labor force was out of work and looking, well below the national rate of 5.4%. Unemployment is down 2.6 points from 2006–10, in line with the national trend. Because the Census pools five years of responses (2020–24), these rates smooth over short swings and lag the current job market.
Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).
St. Charles County compared with nearby counties
| County | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| St. Charles County | 2.59 | 40.8 | 8.5% | 19.5% | 4.5% | 1993 | $1,476 | 42.7% | 95.7% | 3.0% |
| St. Louis County | 2.44 | 41.3 | 11.4% | 30.8% | 8.0% | 1969 | $1,388 | 47.6% | 94.5% | 4.4% |
| Warren County | 2.70 | 42.1 | 9.0% | 19.8% | 12.9% | 1998 | $1,088 | 20.7% | 90.8% | 4.1% |
| St. Louis City | 2.02 | 38.2 | 13.3% | 54.7% | 16.3% | 1946 | $1,044 | 41.0% | 90.7% | 5.9% |
| Madison County | 2.41 | 40.9 | 11.1% | 25.8% | 8.0% | 1974 | $1,069 | 32.6% | 94.1% | 4.5% |
| Bond County | 2.32 | 41.4 | 8.4% | 23.4% | 10.8% | 1970 | $761 | 22.9% | 90.6% | 3.8% |
| Callaway County | 2.53 | 41.8 | 12.5% | 24.5% | 11.4% | 1984 | $914 | 24.6% | 90.9% | 4.6% |
| Moniteau County | 2.48 | 39.3 | 9.7% | 20.8% | 8.4% | 1978 | $714 | 16.3% | 84.0% | 2.3% |
| Clay County | 2.41 | 41.7 | 13.2% | 20.7% | 14.2% | 1975 | $719 | 13.2% | 90.5% | 4.6% |
| Pettis County | 2.59 | 38.9 | 12.0% | 30.9% | 9.8% | 1973 | $941 | 18.5% | 87.4% | 3.6% |
| Richland County | 2.40 | 41.7 | 8.3% | 26.2% | 13.0% | 1973 | $723 | 18.7% | 91.2% | 3.0% |
All figures 2020–24.
Counties with similar populations: Westmoreland County, PA · East Baton Rouge Parish, LA · Escambia County, FL · Fayette County, KY · Forsyth County, NC · Galveston County, TX · Genesee County, MI · Hamilton County, IN · Hamilton County, TN · Henrico County, VA
About these numbers
Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up St. Charles County. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.
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