Population 94,166 · Census ACS 2020–24
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Population and households in St. Clair County
Household size in St. Clair County
| Period | St. Clair County | Birmingham area | Alabama | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.69 | 2.56 | 2.55 | 2.68 |
| 2010–14 | 2.65 | 2.59 | 2.58 | 2.73 |
| 2015–19 | 2.71 | 2.59 | 2.58 | 2.71 |
| 2020–24 | 2.68 | 2.57 | 2.56 | 2.65 |
| Change | −0.01 | +0.01 | +0.00 | −0.03 |
Households in St. Clair County average 2.68 people, about the same as the country as a whole (2.65). The typical household here is bigger than in the Birmingham area as a whole, where it has 2.57 people. Households are largest in the west and smallest in the east.
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. Clair County
| Period | St. Clair County | Birmingham area | Alabama | U.S. |
|---|---|---|---|---|
| 2006–10 | 38.2 | 37.9 | 38.2 | 37.7 |
| 2010–14 | 39.4 | 39.1 | 39.1 | 38.6 |
| 2015–19 | 41.1 | 39.9 | 40.1 | 39.6 |
| 2020–24 | 41.6 | 40.0 | 40.2 | 40.1 |
| Change | +3.5 | +2.1 | +2.0 | +2.3 |
The median resident of St. Clair County is 41.6 years old, a bit older than the national median of 40.1. Since 2006–10, the median age has climbed from 38.2, mirroring the country. Residents skew youngest in the west and oldest in the south.
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. Clair County
| Period | St. Clair County | Birmingham area | Alabama | U.S. |
|---|---|---|---|---|
| 2006–10 | 11.8% | 12.1% | 12.5% | 12.3% |
| 2010–14 | 10.3% | 12.0% | 12.5% | 12.3% |
| 2015–19 | 8.1% | 11.2% | 11.8% | 11.6% |
| 2020–24 | 10.4% | 12.0% | 12.2% | 11.6% |
| Change | −1.4 pts | −0.1 pts | −0.3 pts | −0.6 pts |
Single parents head about one in ten households in St. Clair County (10.4%), a little below the national share of 11.6%. Since 2006–10, the single-parent share has edged down 1.4 points, in line with the national trend.
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. Clair County
Renters in St. Clair County
| Period | St. Clair County | Birmingham area | Alabama | U.S. |
|---|---|---|---|---|
| 2006–10 | 17.8% | 27.9% | 28.9% | 33.3% |
| 2010–14 | 19.4% | 30.4% | 30.8% | 35.6% |
| 2015–19 | 20.2% | 30.6% | 31.2% | 36.0% |
| 2020–24 | 17.4% | 29.2% | 29.8% | 34.8% |
| Change | −0.4 pts | +1.3 pts | +0.9 pts | +1.5 pts |
St. Clair County is largely a place of homeowners: only 17.4% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Among homeowners, 40.5% have no mortgage at all, about the same as nationally. Only one other Alabama county has a lower share of renters.
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. Clair County
| Period | St. Clair County | Birmingham area | Alabama | U.S. |
|---|---|---|---|---|
| 2006–10 | 13.5% | 12.5% | 14.0% | 11.4% |
| 2010–14 | 11.1% | 12.8% | 14.6% | 11.4% |
| 2015–19 | 12.5% | 13.6% | 15.7% | 11.1% |
| 2020–24 | 10.6% | 11.6% | 13.5% | 9.6% |
| Change | −2.9 pts | −1.0 pts | −0.5 pts | −1.8 pts |
About as many homes sit empty in St. Clair County as nationally: 10.6%, against 9.6%. Vacancy is down 2.9 points from 2006–10, in line with the national trend. Of Alabama's 67 counties, only five have 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. Clair County
| Period | St. Clair County | Birmingham area | Alabama | U.S. |
|---|---|---|---|---|
| 2006–10 | 1987 | 1979 | 1980 | 1974 |
| 2010–14 | 1992 | 1981 | 1982 | 1975 |
| 2015–19 | 1994 | 1982 | 1983 | 1977 |
| 2020–24 | 1996 | 1984 | 1986 | 1980 |
| Change | +10 | +5 | +6 | +6 |
St. Clair County has newer housing than the country as a whole: the median home was built in 1996, versus 1980 nationally. The median year built has moved up from 1987 in 2006–10, a sign of steady new building. Newer construction is concentrated in the west, while the east has the oldest housing. Of Alabama's 67 counties, only four have newer homes.
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. Clair County
| Period | St. Clair County | Birmingham area | Alabama | U.S. |
|---|---|---|---|---|
| 2006–10 | $726 | $827 | $716 | $965 |
| 2010–14 | $740 | $903 | $785 | $1,040 |
| 2015–19 | $798 | $984 | $858 | $1,213 |
| 2020–24 | $1,139 | $1,238 | $1,091 | $1,571 |
| Change | +$413 | +$412 | +$375 | +$606 |
Rent in St. Clair County runs $1,139 a month at the median, utilities included, well below the U.S. median of $1,571. Rent has climbed $413 a month since 2006–10, up 57%, a slower climb than the nation's. The typical renter here spends 25.3% 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 northeast; the highest are in the southwest.
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. Clair County
Bachelor's degrees in St. Clair County
| Period | St. Clair County | Birmingham area | Alabama | U.S. |
|---|---|---|---|---|
| 2006–10 | 14.5% | 28.3% | 23.3% | 28.4% |
| 2010–14 | 15.5% | 29.1% | 24.3% | 29.6% |
| 2015–19 | 16.2% | 31.1% | 26.2% | 32.1% |
| 2020–24 | 22.2% | 34.7% | 29.0% | 35.6% |
| Change | +7.7 pts | +6.4 pts | +5.7 pts | +7.2 pts |
Fewer adults in St. Clair County have a four-year degree than in the country as a whole: 22.2%, against 35.6% nationally. The share with a degree is up 7.7 points from 2006–10, mirroring the country. College graduates are most concentrated in the northwest and least in the east.
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. Clair County
| Period | St. Clair County | Birmingham area | Alabama | U.S. |
|---|---|---|---|---|
| 2006–10 | 79.2% | 85.7% | 82.3% | 84.9% |
| 2010–14 | 82.1% | 86.8% | 84.3% | 86.1% |
| 2015–19 | 85.1% | 88.9% | 86.4% | 87.7% |
| 2020–24 | 88.5% | 90.5% | 88.7% | 89.3% |
| Change | +9.2 pts | +4.9 pts | +6.4 pts | +4.3 pts |
High school completion in St. Clair County is close to the national rate: 88.5% of adults have a diploma or equivalent, against 89.3%. The rate is lower than in the wider Birmingham area (90.5%). The share with a diploma is up 9.2 points from 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 St. Clair County
| Period | St. Clair County | Birmingham area | Alabama | U.S. |
|---|---|---|---|---|
| 2006–10 | 7.3% | 8.0% | 8.6% | 8.1% |
| 2010–14 | 9.2% | 9.2% | 10.2% | 9.4% |
| 2015–19 | 5.3% | 5.9% | 6.1% | 5.6% |
| 2020–24 | 4.4% | 4.4% | 4.9% | 5.4% |
| Change | −2.9 pts | −3.6 pts | −3.7 pts | −2.7 pts |
Jobs have been a little easier to find in St. Clair County than nationally: unemployment was 4.4%, against 5.4%. Since 2006–10, unemployment has fallen 2.9 points, mirroring the country. 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).
St. Clair 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. Clair County | 2.68 | 41.6 | 10.4% | 17.4% | 10.6% | 1996 | $1,139 | 22.2% | 88.5% | 4.4% |
| Jefferson County | 2.51 | 39.2 | 13.6% | 36.1% | 12.9% | 1977 | $1,282 | 37.6% | 91.2% | 4.6% |
| Calhoun County | 2.54 | 39.3 | 13.6% | 29.7% | 17.7% | 1981 | $856 | 20.7% | 86.7% | 6.6% |
| Cleburne County | 2.59 | 42.2 | 10.1% | 21.5% | 13.4% | 1986 | $747 | 17.3% | 86.4% | 3.1% |
| Haralson County | 2.74 | 38.7 | 8.9% | 28.4% | 9.6% | 1988 | $953 | 18.7% | 84.5% | 4.4% |
| Carroll County | 2.88 | 36.3 | 14.4% | 28.7% | 9.4% | 1991 | $1,210 | 23.3% | 85.4% | 6.1% |
| Fayette County | 2.57 | 43.9 | 10.1% | 21.6% | 19.7% | 1982 | $709 | 14.2% | 85.3% | 8.7% |
| Douglas County | 2.89 | 38.0 | 16.5% | 33.1% | 8.3% | 1994 | $1,628 | 31.3% | 91.6% | 6.6% |
| Lamar County | 2.78 | 45.4 | 10.6% | 24.3% | 29.3% | 1979 | $620 | 12.1% | 84.0% | 5.0% |
| Clayton County | 2.91 | 34.6 | 20.6% | 45.5% | 9.2% | 1989 | $1,577 | 23.2% | 85.7% | 7.3% |
| Lowndes County | 2.51 | 39.8 | 16.6% | 38.7% | 14.4% | 1982 | $927 | 28.0% | 89.6% | 6.5% |
All figures 2020–24.
Counties with similar populations: Bannock County, ID · Madison County, KY · Orangeburg County, SC · Orange County, TX · Northumberland County, PA · Newport County, RI · Nash County, NC · Muskingum County, OH · Moore County, NC · Montgomery 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. Clair 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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