Population 105,950 · Census ACS 2020–24
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Population and households in Franklin County
Household size in Franklin County
| Period | Franklin County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.62 | 2.52 | 2.49 | 2.68 |
| 2010–14 | 2.55 | 2.53 | 2.52 | 2.73 |
| 2015–19 | 2.52 | 2.49 | 2.50 | 2.71 |
| 2020–24 | 2.46 | 2.46 | 2.49 | 2.65 |
| Change | −0.15 | −0.06 | −0.00 | −0.03 |
Households in Franklin County run small, averaging 2.46 people against 2.65 nationally, which usually means more singles and couples and fewer children. Since 2006–10, household size has dropped from 2.62, a much bigger shift than nationally. Households are largest in the northwest and smallest in the southwest.
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 Franklin County
| Period | Franklin County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 39.0 | 38.5 | 38.4 | 37.7 |
| 2010–14 | 40.1 | 39.5 | 39.2 | 38.6 |
| 2015–19 | 41.3 | 40.7 | 40.0 | 39.6 |
| 2020–24 | 41.8 | 40.8 | 40.1 | 40.1 |
| Change | +2.8 | +2.3 | +1.7 | +2.3 |
Franklin County skews a little older than the country: its median age is 41.8, against 40.1 nationally. The median age has climbed from 39.0 in 2006–10, in line with the national trend. The youngest areas are in the center, the oldest in the southeast.
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 Franklin County
| Period | Franklin County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 9.8% | 11.7% | 11.3% | 12.3% |
| 2010–14 | 10.0% | 11.5% | 11.4% | 12.3% |
| 2015–19 | 10.8% | 11.0% | 10.9% | 11.6% |
| 2020–24 | 10.7% | 11.1% | 11.0% | 11.6% |
| Change | +0.9 pts | −0.6 pts | −0.3 pts | −0.6 pts |
Single parents head just over one in ten households in Franklin County (10.7%), close to the national share of 11.6%. The single-parent share has edged up 0.9 points since 2006–10, even as the national share fell.
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 Franklin County
Renters in Franklin County
| Period | Franklin County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 23.2% | 28.3% | 30.0% | 33.3% |
| 2010–14 | 24.5% | 30.1% | 32.1% | 35.6% |
| 2015–19 | 25.5% | 31.1% | 33.2% | 36.0% |
| 2020–24 | 23.5% | 29.6% | 31.9% | 34.8% |
| Change | +0.3 pts | +1.4 pts | +1.9 pts | +1.5 pts |
Franklin County is largely a place of homeowners: only 23.5% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Among homeowners, 40.3% have no mortgage at all, about the same as nationally. Renting is most common in the center and least common in the southeast.
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 Franklin County
| Period | Franklin County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 10.3% | 9.6% | 11.6% | 11.4% |
| 2010–14 | 9.2% | 10.1% | 12.0% | 11.4% |
| 2015–19 | 9.9% | 10.1% | 12.2% | 11.1% |
| 2020–24 | 8.0% | 8.8% | 10.5% | 9.6% |
| Change | −2.3 pts | −0.8 pts | −1.1 pts | −1.8 pts |
Vacancy is on the low side in Franklin County: 8.0% of homes sit empty, against 9.6% nationally, which points to steady demand for housing. Vacancy is down 2.3 points from 2006–10, as it has nationally. Few Missouri counties have a lower vacancy rate: only 11 of 115.
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 Franklin County
| Period | Franklin County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 1979 | 1972 | 1974 | 1974 |
| 2010–14 | 1980 | 1972 | 1975 | 1975 |
| 2015–19 | 1982 | 1973 | 1976 | 1977 |
| 2020–24 | 1983 | 1975 | 1978 | 1980 |
| Change | +4 | +3 | +4 | +6 |
The typical home in Franklin County was built around 1983, about the same vintage as the country's housing overall (1980). Homes here are newer than in the wider St. Louis area, where the median home dates to 1975. The median year built has moved up from 1979 in 2006–10, a sign of steady new building. Newer construction is concentrated in the northeast, while the southwest has the oldest housing.
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 Franklin County
| Period | Franklin County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | $658 | $825 | $740 | $965 |
| 2010–14 | $717 | $920 | $816 | $1,040 |
| 2015–19 | $805 | $1,010 | $899 | $1,213 |
| 2020–24 | $947 | $1,239 | $1,122 | $1,571 |
| Change | +$289 | +$414 | +$383 | +$606 |
A typical rental in Franklin County costs $947 a month with utilities, well below the national median of $1,571. Rent has climbed $289 a month since 2006–10, up 44%, a slower climb than the nation's. The typical renter here spends 24.2% of household income on rent, comfortably under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally. Renters on a budget will find the lowest rents in the center; the highest are in the northeast.
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 Franklin County
Bachelor's degrees in Franklin County
| Period | Franklin County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 16.7% | 30.3% | 26.0% | 28.4% |
| 2010–14 | 18.3% | 32.1% | 27.3% | 29.6% |
| 2015–19 | 21.0% | 34.9% | 29.6% | 32.1% |
| 2020–24 | 23.7% | 38.5% | 32.6% | 35.6% |
| Change | +7.0 pts | +8.3 pts | +6.6 pts | +7.2 pts |
College degrees are relatively uncommon in Franklin County: 23.7% of adults 25 and older hold a bachelor's or higher, well below the national share of 35.6%. The share with a degree has risen 7.0 points since 2006–10, in line with the national trend. College graduates are most concentrated in the northeast and least in the south.
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 Franklin County
| Period | Franklin County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 85.0% | 88.8% | 86.8% | 84.9% |
| 2010–14 | 87.1% | 90.5% | 88.3% | 86.1% |
| 2015–19 | 88.5% | 92.1% | 90.0% | 87.7% |
| 2020–24 | 90.5% | 93.6% | 91.8% | 89.3% |
| Change | +5.5 pts | +4.8 pts | +5.1 pts | +4.3 pts |
High school completion in Franklin County is close to the national rate: 90.5% of adults have a diploma or equivalent, against 89.3%. The rate is lower than in the St. Louis area overall (93.6%). Since 2006–10, the share with a diploma has risen 5.5 points, as it has nationally.
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 Franklin County
| Period | Franklin County | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 7.3% | 7.7% | 7.4% | 8.1% |
| 2010–14 | 8.5% | 8.8% | 8.4% | 9.4% |
| 2015–19 | 4.4% | 4.9% | 4.6% | 5.6% |
| 2020–24 | 4.3% | 4.3% | 4.1% | 5.4% |
| Change | −3.0 pts | −3.4 pts | −3.3 pts | −2.7 pts |
Jobs have been a little easier to find in Franklin County than nationally: unemployment was 4.3%, against 5.4%. Unemployment is down 3.0 points from 2006–10, mirroring the country. 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).
Franklin 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Franklin County | 2.46 | 41.8 | 10.7% | 23.5% | 8.0% | 1983 | $947 | 23.7% | 90.5% | 4.3% |
| Gasconade County | 2.42 | 46.0 | 10.1% | 19.1% | 18.7% | 1976 | $797 | 17.3% | 90.4% | 3.1% |
| Jefferson County | 2.62 | 41.0 | 11.1% | 17.8% | 6.9% | 1987 | $1,089 | 25.1% | 92.2% | 3.2% |
| Monroe County | 2.53 | 43.6 | 6.8% | 15.3% | 6.8% | 1987 | $1,048 | 38.4% | 96.0% | 1.9% |
| Osage County | 2.54 | 40.9 | 6.5% | 20.6% | 20.9% | 1982 | $700 | 24.8% | 90.9% | 1.9% |
| St. Clair County | 2.57 | 40.2 | 13.5% | 31.6% | 11.5% | 1978 | $1,199 | 33.0% | 93.4% | 5.6% |
| Cole County | 2.41 | 40.3 | 10.4% | 32.1% | 7.9% | 1982 | $893 | 39.3% | 94.6% | 3.1% |
| Clinton County | 2.42 | 42.1 | 7.3% | 19.7% | 8.3% | 1978 | $931 | 26.7% | 92.9% | 3.6% |
| Washington County | 2.32 | 45.4 | 10.0% | 15.9% | 9.4% | 1972 | $840 | 23.4% | 93.1% | 4.3% |
| Morgan County | 2.53 | 44.4 | 5.0% | 20.3% | 29.9% | 1982 | $794 | 16.3% | 79.6% | 3.2% |
| Marion County | 2.39 | 40.7 | 13.2% | 25.3% | 11.1% | 1973 | $841 | 16.8% | 90.3% | 6.0% |
All figures 2020–24.
Counties with similar populations: Rockwall County, TX · Franklin County, WA · Garland County, AR · Geauga County, OH · Grand Traverse County, MI · Grant County, WA · Hanover County, VA · Hardin County, KY · Houston County, AL · Hunt County, TX
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 Franklin 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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