Population 11,540 · Census ACS 2020–24
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Population and households in St. Clair
Household size in St. Clair
| Period | St. Clair | Detroit area | Michigan | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.52 | 2.63 | 2.58 | 2.68 |
| 2010–14 | 2.47 | 2.63 | 2.58 | 2.73 |
| 2015–19 | 2.47 | 2.58 | 2.53 | 2.71 |
| 2020–24 | 2.38 | 2.57 | 2.51 | 2.65 |
| Change | −0.13 | −0.07 | −0.06 | −0.03 |
Households in St. Clair are small: just 2.38 people on average, compared with 2.65 nationally. That is typical of places where many people live alone or as couples, and fewer have children at home. Household size has dropped from 2.52 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. Clair
| Period | St. Clair | Detroit area | Michigan | U.S. |
|---|---|---|---|---|
| 2006–10 | 39.4 | 39.0 | 38.9 | 37.7 |
| 2010–14 | 42.5 | 40.1 | 40.1 | 38.6 |
| 2015–19 | 43.9 | 40.9 | 41.0 | 39.6 |
| 2020–24 | 45.3 | 41.0 | 41.3 | 40.1 |
| Change | +5.8 | +2.1 | +2.4 | +2.3 |
St. Clair skews older: half of its residents are older than 45.3, well above the national median of 40.1. That usually means more empty nesters and retirees, and fewer young families. The median age has climbed from 39.4 in 2006–10, in line with the national trend.
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
| Period | St. Clair | Detroit area | Michigan | U.S. |
|---|---|---|---|---|
| 2006–10 | 7.1% | 12.1% | 11.3% | 12.3% |
| 2010–14 | 7.1% | 12.3% | 11.5% | 12.3% |
| 2015–19 | 6.1% | 11.3% | 10.9% | 11.6% |
| 2020–24 | 8.0% | 11.2% | 10.7% | 11.6% |
| Change | +0.9 pts | −0.9 pts | −0.6 pts | −0.6 pts |
Single-parent households are relatively rare in St. Clair: 8.0% of households, against 11.6% nationally. Since 2006–10, the single-parent share has edged up 0.9 points, 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 St. Clair
Renters in St. Clair
| Period | St. Clair | Detroit area | Michigan | U.S. |
|---|---|---|---|---|
| 2006–10 | 18.5% | 26.7% | 25.8% | 33.3% |
| 2010–14 | 18.3% | 30.2% | 28.5% | 35.6% |
| 2015–19 | 14.4% | 31.0% | 28.8% | 36.0% |
| 2020–24 | 19.3% | 28.8% | 26.8% | 34.8% |
| Change | +0.8 pts | +2.1 pts | +1.0 pts | +1.5 pts |
St. Clair is largely a place of homeowners: only 19.3% 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 (43.0%) have paid off their mortgages, above the national share of 39.8%. The renter share has edged up 0.8 points since 2006–10, in line with the national trend.
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
| Period | St. Clair | Detroit area | Michigan | U.S. |
|---|---|---|---|---|
| 2006–10 | 8.2% | 11.3% | 13.0% | 11.4% |
| 2010–14 | 7.7% | 11.2% | 13.0% | 11.4% |
| 2015–19 | 10.4% | 10.0% | 11.9% | 11.1% |
| 2020–24 | 2.2% | 8.3% | 10.2% | 9.6% |
| Change | −6.0 pts | −3.1 pts | −2.8 pts | −1.8 pts |
Only 2.2% of homes in St. Clair are vacant, far below the national rate of 9.6%, which usually means strong demand for housing. Since 2006–10, vacancy has fallen 6.0 points, a much bigger shift than nationally. Only two of the 331 Michigan cities with 5,000+ people 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
| Period | St. Clair | Detroit area | Michigan | U.S. |
|---|---|---|---|---|
| 2006–10 | 1971 | 1968 | 1969 | 1974 |
| 2010–14 | 1974 | 1969 | 1970 | 1975 |
| 2015–19 | 1975 | 1969 | 1971 | 1977 |
| 2020–24 | 1976 | 1970 | 1972 | 1980 |
| Change | +5 | +2 | +3 | +6 |
Homes in St. Clair are about the same age as the nation's housing: the median home was built in 1976, versus 1980 nationally. Homes here are newer than in the wider Detroit area, where the median home dates to 1970. The median year built has moved up from 1971 in 2006–10, a sign of steady new building. Newer construction is concentrated in the northeast, while the southeast 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 St. Clair
| Period | St. Clair | Detroit area | Michigan | U.S. |
|---|---|---|---|---|
| 2006–10 | $653 | $952 | $833 | $965 |
| 2010–14 | $750 | $1,005 | $886 | $1,040 |
| 2015–19 | $866 | $1,123 | $978 | $1,213 |
| 2020–24 | $1,143 | $1,373 | $1,228 | $1,571 |
| Change | +$489 | +$421 | +$395 | +$606 |
Rent in St. Clair runs $1,143 a month at the median, utilities included, well below the U.S. median of $1,571. Rents are up $489 a month from 2006–10, a 75% jump, faster than rents rose nationally. Rent takes 25.5% of the typical renter's income, comfortably under the 30% mark often used to define affordable rent. Rents run highest in the northeast and lowest in the northwest.
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
Bachelor's degrees in St. Clair
| Period | St. Clair | Detroit area | Michigan | U.S. |
|---|---|---|---|---|
| 2006–10 | 25.8% | 27.8% | 26.1% | 28.4% |
| 2010–14 | 25.2% | 28.8% | 27.1% | 29.6% |
| 2015–19 | 27.4% | 31.1% | 29.5% | 32.1% |
| 2020–24 | 27.5% | 34.5% | 32.7% | 35.6% |
| Change | +1.8 pts | +6.7 pts | +6.6 pts | +7.2 pts |
More than a quarter of adults 25 and older in St. Clair (27.5%) have a bachelor's degree or higher, below the national share of 35.6%. The share with a degree is up 1.8 points from 2006–10, a smaller shift than nationally. College graduates are most concentrated in the northeast and least in the northwest.
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
| Period | St. Clair | Detroit area | Michigan | U.S. |
|---|---|---|---|---|
| 2006–10 | 93.9% | 87.7% | 88.3% | 84.9% |
| 2010–14 | 92.3% | 88.4% | 89.3% | 86.1% |
| 2015–19 | 93.5% | 89.8% | 90.7% | 87.7% |
| 2020–24 | 95.0% | 90.9% | 91.8% | 89.3% |
| Change | +1.1 pts | +3.2 pts | +3.5 pts | +4.3 pts |
High school completion is high in St. Clair: 95.0% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. Since 2006–10, the share with a diploma has edged up 1.1 points, a smaller shift than 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 St. Clair
| Period | St. Clair | Detroit area | Michigan | U.S. |
|---|---|---|---|---|
| 2006–10 | 7.9% | 12.7% | 11.5% | 8.1% |
| 2010–14 | 9.5% | 12.8% | 11.7% | 9.4% |
| 2015–19 | 4.7% | 6.8% | 6.1% | 5.6% |
| 2020–24 | 2.9% | 6.7% | 5.9% | 5.4% |
| Change | −5.0 pts | −5.9 pts | −5.7 pts | −2.7 pts |
The job market in St. Clair has been strong: just 2.9% of the labor force was out of work and looking, well below the national rate of 5.4%. Unemployment is down 5.0 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).
St. Clair compared with nearby cities
| City | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| St. Clair | 2.38 | 45.3 | 8.0% | 19.3% | 2.2% | 1976 | $1,143 | 27.5% | 95.0% | 2.9% |
| East China | 2.46 | 50.8 | 5.7% | 14.3% | 7.5% | 1985 | $953 | 23.0% | 94.4% | 8.9% |
| Marysville | 2.34 | 45.5 | 7.8% | 16.1% | 4.9% | 1978 | $1,009 | 25.1% | 93.7% | 3.3% |
| Rattle Run | 2.59 | 46.6 | 8.2% | 1.9% | 1.2% | 1989 | $1,018 | 16.2% | 94.5% | 2.7% |
| Four Towns | 2.39 | 55.9 | 4.1% | 2.8% | 5.5% | 1989 | $909 | 19.7% | 92.8% | 11.3% |
| Anchorville | 2.52 | 44.8 | 12.2% | 17.0% | 1.8% | 1994 | $1,264 | 25.8% | 94.3% | 4.3% |
| Smiths Creek | 2.52 | 44.6 | 10.0% | 10.9% | 3.0% | 1983 | $1,153 | 15.1% | 91.6% | 3.5% |
| Columbus | 2.61 | 41.5 | 9.9% | 12.5% | 1.4% | 1992 | $1,464 | 30.8% | 94.0% | 3.2% |
| Mount Vernon | 2.74 | 38.7 | 6.6% | 3.4% | 0.7% | 1988 | $1,583 | 32.2% | 92.8% | 2.0% |
| Marine City | 2.35 | 49.1 | 4.4% | 13.7% | 11.2% | 1957 | $964 | 20.9% | 91.2% | 5.9% |
| Peters | 2.89 | 44.1 | 12.9% | 3.2% | 9.4% | 1979 | $954 | 13.0% | 96.4% | 3.7% |
All figures 2020–24.
Cities with similar populations: Bridge City, TX · Commerce, CA · Chipley, FL · Cheraw, SC · Charlton, MA · Cascades, VA · Burr Ridge, IL · Burkburnett, TX · Brownsville, TN · Brooklyn, OH
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. 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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