Population 36,954 · Census ACS 2020–24
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Population and households in Clinton County
Household size in Clinton County
| Period | Clinton County | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.49 | 2.52 | 2.69 | 2.68 |
| 2010–14 | 2.60 | 2.53 | 2.71 | 2.73 |
| 2015–19 | 2.47 | 2.49 | 2.66 | 2.71 |
| 2020–24 | 2.42 | 2.46 | 2.58 | 2.65 |
| Change | −0.07 | −0.06 | −0.11 | −0.03 |
The average household in Clinton County has 2.42 people, under the U.S. average of 2.65. Since 2006–10, household size has edged down from 2.49, as it has nationally. Households are largest in the northwest and smallest in the northeast.
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 Clinton County
| Period | Clinton County | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | 40.1 | 38.5 | 37.6 | 37.7 |
| 2010–14 | 40.4 | 39.5 | 38.5 | 38.6 |
| 2015–19 | 41.5 | 40.7 | 39.6 | 39.6 |
| 2020–24 | 42.1 | 40.8 | 40.2 | 40.1 |
| Change | +1.9 | +2.3 | +2.6 | +2.3 |
Clinton County skews a little older than the country: its median age is 42.1, against 40.1 nationally. The picture is much the same across the St. Louis area. The median age has climbed from 40.1 in 2006–10, as it has nationally.
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 Clinton County
| Period | Clinton County | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | 10.1% | 11.7% | 11.7% | 12.3% |
| 2010–14 | 9.7% | 11.5% | 11.7% | 12.3% |
| 2015–19 | 8.5% | 11.0% | 11.1% | 11.6% |
| 2020–24 | 7.3% | 11.1% | 11.3% | 11.6% |
| Change | −2.8 pts | −0.6 pts | −0.4 pts | −0.6 pts |
Single parents head only 7.3% of households in Clinton County, well below the national share of 11.6%. Since 2006–10, the single-parent share has fallen 2.8 points, a much bigger shift than nationally. Of Illinois' 102 counties, only six have a lower share of single-parent households.
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 Clinton County
Renters in Clinton County
| Period | Clinton County | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | 20.0% | 28.3% | 30.8% | 33.3% |
| 2010–14 | 17.3% | 30.1% | 33.1% | 35.6% |
| 2015–19 | 20.4% | 31.1% | 33.9% | 36.0% |
| 2020–24 | 19.7% | 29.6% | 32.9% | 34.8% |
| Change | −0.3 pts | +1.4 pts | +2.1 pts | +1.5 pts |
Clinton County is largely a place of homeowners: only 19.7% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. More than four in ten owners (45.6%) have paid off their mortgages, above the national share of 39.8%. Rentals cluster in the southwest; owners are most common in the northwest.
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 Clinton County
| Period | Clinton County | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | 8.4% | 9.6% | 10.0% | 11.4% |
| 2010–14 | 9.7% | 10.1% | 10.1% | 11.4% |
| 2015–19 | 10.4% | 10.1% | 9.8% | 11.1% |
| 2020–24 | 8.3% | 8.8% | 8.1% | 9.6% |
| Change | −0.1 pts | −0.8 pts | −1.9 pts | −1.8 pts |
Vacancy in Clinton County is close to the national rate: 8.3% of homes are empty, against 9.6%. Clinton County has a lower vacancy rate than most Illinois counties.
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 Clinton County
| Period | Clinton County | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | 1972 | 1972 | 1966 | 1974 |
| 2010–14 | 1977 | 1972 | 1967 | 1975 |
| 2015–19 | 1976 | 1973 | 1968 | 1977 |
| 2020–24 | 1978 | 1975 | 1970 | 1980 |
| Change | +6 | +3 | +4 | +6 |
Homes in Clinton County are about the same age as the nation's housing: the median home was built in 1978, versus 1980 nationally. The median year built has moved up from 1972 in 2006–10, a sign of steady new building. The newest homes are mostly in the northwest, the oldest in the southeast.
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 Clinton County
| Period | Clinton County | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | $688 | $825 | $953 | $965 |
| 2010–14 | $715 | $920 | $1,028 | $1,040 |
| 2015–19 | $846 | $1,010 | $1,165 | $1,213 |
| 2020–24 | $931 | $1,239 | $1,428 | $1,571 |
| Change | +$244 | +$414 | +$475 | +$606 |
The median renter in Clinton County pays $931 a month for rent and utilities, well below the national median of $1,571. Rent has climbed $244 a month since 2006–10, up 35%, a slower climb than the nation's. Rent takes 27.2% of the typical renter's income, just under the 30% mark often used to define affordable rent. Rents run highest in the southwest and lowest in the southeast.
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 Clinton County
Bachelor's degrees in Clinton County
| Period | Clinton County | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | 19.7% | 30.3% | 31.2% | 28.4% |
| 2010–14 | 20.8% | 32.1% | 32.4% | 29.6% |
| 2015–19 | 23.3% | 34.9% | 34.7% | 32.1% |
| 2020–24 | 26.7% | 38.5% | 37.7% | 35.6% |
| Change | +7.0 pts | +8.3 pts | +6.5 pts | +7.2 pts |
College degrees are less common in Clinton County than nationally: 26.7% of adults 25 and older have a bachelor's or higher, against 35.6%. Since 2006–10, the share with a degree has risen 7.0 points, as it has nationally. College graduates are most concentrated in the west and least in the southeast.
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 Clinton County
| Period | Clinton County | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | 86.7% | 88.8% | 86.3% | 84.9% |
| 2010–14 | 89.6% | 90.5% | 87.5% | 86.1% |
| 2015–19 | 90.8% | 92.1% | 89.1% | 87.7% |
| 2020–24 | 92.9% | 93.6% | 90.3% | 89.3% |
| Change | +6.2 pts | +4.8 pts | +4.0 pts | +4.3 pts |
Just over nine in ten adults in Clinton County have finished high school (92.9%), above the national rate of 89.3%. The St. Louis area as a whole looks much the same. The share with a diploma has risen 6.2 points since 2006–10, in line with the national trend.
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 Clinton County
| Period | Clinton County | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | 5.6% | 7.7% | 8.7% | 8.1% |
| 2010–14 | 5.6% | 8.8% | 10.2% | 9.4% |
| 2015–19 | 2.7% | 4.9% | 6.1% | 5.6% |
| 2020–24 | 3.6% | 4.3% | 6.0% | 5.4% |
| Change | −2.0 pts | −3.4 pts | −2.7 pts | −2.7 pts |
Unemployment in Clinton County runs below the national rate: 3.6% of the labor force was out of work and looking, against 5.4% nationally. Unemployment is down 2.0 points from 2006–10, in line with the national trend. Each figure pools five years of surveys (2020–24), so it describes that whole stretch rather than today's 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).
Clinton 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Clinton County | 2.42 | 42.1 | 7.3% | 19.7% | 8.3% | 1978 | $931 | 26.7% | 92.9% | 3.6% |
| Marion County | 2.39 | 40.7 | 13.2% | 25.3% | 11.1% | 1973 | $841 | 16.8% | 90.3% | 6.0% |
| St. Clair County | 2.57 | 40.2 | 13.5% | 31.6% | 11.5% | 1978 | $1,199 | 33.0% | 93.4% | 5.6% |
| St. Louis City | 2.02 | 38.2 | 13.3% | 54.7% | 16.3% | 1946 | $1,044 | 41.0% | 90.7% | 5.9% |
| St. Louis County | 2.44 | 41.3 | 11.4% | 30.8% | 8.0% | 1969 | $1,388 | 47.6% | 94.5% | 4.4% |
| Wayne County | 2.37 | 42.5 | 8.6% | 21.6% | 10.3% | 1976 | $704 | 16.1% | 89.1% | 3.5% |
| Edwards County | 2.30 | 45.3 | 9.6% | 20.7% | 11.6% | 1969 | $704 | 14.2% | 92.0% | 4.8% |
| Franklin County | 2.46 | 41.8 | 10.7% | 23.5% | 8.0% | 1983 | $947 | 23.7% | 90.5% | 4.3% |
| Wabash County | 2.32 | 42.3 | 13.2% | 23.7% | 13.5% | 1965 | $793 | 17.6% | 92.6% | 3.8% |
| Gasconade County | 2.42 | 46.0 | 10.1% | 19.1% | 18.7% | 1976 | $797 | 17.3% | 90.4% | 3.1% |
| Knox County | 2.32 | 39.7 | 11.0% | 32.2% | 13.2% | 1963 | $945 | 20.3% | 89.9% | 3.1% |
All figures 2020–24.
Counties with similar populations: Las Piedras Municipio, PR · Montrose County, CO · Monroe County, WI · Monroe County, TN · Macoupin County, IL · Macon County, NC · Lyon County, KS · Louisa County, VA · Logan County, OH · Livingston County, IL
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 Clinton 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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