Population 459 · Census ACS 2020–24
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Median age by neighborhoodHistory and comparison ↓︎
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Population and households in St. Johns
Household size in St. Johns
| Period | St. Johns | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 2.47 | 2.69 | 2.68 |
| 2010–14 | 2.49 | 2.71 | 2.73 |
| 2015–19 | 2.15 | 2.66 | 2.71 |
| 2020–24 | 2.39 | 2.58 | 2.65 |
| Change | −0.08 | −0.11 | −0.03 |
Households in St. Johns are small: just 2.39 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: 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. Johns
| Period | St. Johns | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 42.0 | 37.6 | 37.7 |
| 2010–14 | 40.1 | 38.5 | 38.6 |
| 2015–19 | 49.1 | 39.6 | 39.6 |
| 2020–24 | 44.3 | 40.2 | 40.1 |
| Change | +2.3 | +2.6 | +2.3 |
St. Johns skews older: half of its residents are older than 44.3, 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 42.0 in 2006–10, but in a place this small, much of that may be survey noise rather than real change.
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. Johns
| Period | St. Johns | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 13.2% | 11.7% | 12.3% |
| 2010–14 | 11.6% | 11.7% | 12.3% |
| 2015–19 | 9.0% | 11.1% | 11.6% |
| 2020–24 | 12.5% | 11.3% | 11.6% |
| Change | −0.7 pts | −0.4 pts | −0.6 pts |
Single parents head about one in eight households in St. Johns (12.5%), close to the national share of 11.6%. Single parents are more common here than in Illinois as a whole (11.3%).
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. Johns
Renters in St. Johns
| Period | St. Johns | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 25.5% | 30.8% | 33.3% |
| 2010–14 | 35.0% | 33.1% | 35.6% |
| 2015–19 | 21.5% | 33.9% | 36.0% |
| 2020–24 | 27.1% | 32.9% | 34.8% |
| Change | +1.5 pts | +2.1 pts | +1.5 pts |
Most households in St. Johns own their homes; 27.1% rent, below the national share of 34.8%. Among homeowners, 62.7% have no mortgage at all, well above the national share of 39.8%.
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. Johns
| Period | St. Johns | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 18.0% | 10.0% | 11.4% |
| 2010–14 | 16.5% | 10.1% | 11.4% |
| 2015–19 | 18.4% | 9.8% | 11.1% |
| 2020–24 | 17.8% | 8.1% | 9.6% |
| Change | −0.3 pts | −1.9 pts | −1.8 pts |
Vacant homes make up 17.8% of the housing in St. Johns, far above the national rate of 9.6%. In resort and lake areas that usually means seasonal and vacation homes; elsewhere it can point to weak demand.
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. Johns
| Period | St. Johns | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 1967 | 1966 | 1974 |
| 2010–14 | 1973 | 1967 | 1975 |
| 2015–19 | 1973 | 1968 | 1977 |
| 2020–24 | 1973 | 1970 | 1980 |
| Change | +6 | +4 | +6 |
Housing in St. Johns leans older: the median home dates to 1973, against 1980 nationally. That is in line with the rest of Illinois.
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. Johns
| Period | St. Johns | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | $510 | $953 | $965 |
| 2010–14 | $505 | $1,028 | $1,040 |
| 2015–19 | $547 | $1,165 | $1,213 |
| 2020–24 | $602 | $1,428 | $1,571 |
| Change | +$92 | +$475 | +$606 |
The median renter in St. Johns pays $602 a month for rent and utilities, well below the national median of $1,571. Rent takes 22.6% of the typical renter's income, comfortably under the 30% mark often used to define affordable rent.
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. Johns
Bachelor's degrees in St. Johns
| Period | St. Johns | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 12.6% | 31.2% | 28.4% |
| 2010–14 | 12.9% | 32.4% | 29.6% |
| 2015–19 | 9.8% | 34.7% | 32.1% |
| 2020–24 | 17.2% | 37.7% | 35.6% |
| Change | +4.6 pts | +6.5 pts | +7.2 pts |
Fewer adults in St. Johns have a four-year degree than in the country as a whole: 17.2%, against 35.6% nationally.
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. Johns
| Period | St. Johns | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 85.9% | 86.3% | 84.9% |
| 2010–14 | 87.6% | 87.5% | 86.1% |
| 2015–19 | 91.5% | 89.1% | 87.7% |
| 2020–24 | 93.3% | 90.3% | 89.3% |
| Change | +7.4 pts | +4.0 pts | +4.3 pts |
High school completion in St. Johns is above the national rate: 93.3% of adults have a diploma or equivalent, against 89.3%.
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. Johns
| Period | St. Johns | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 10.1% | 8.7% | 8.1% |
| 2010–14 | 6.8% | 10.2% | 9.4% |
| 2015–19 | 5.5% | 6.1% | 5.6% |
| 2020–24 | 8.1% | 6.0% | 5.4% |
| Change | −2.0 pts | −2.7 pts | −2.7 pts |
Unemployment in St. Johns runs well above the national rate: 8.1% of the labor force was out of work and looking, against 5.4%. 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. Johns 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. Johns | 2.39 | 44.3 | 12.5% | 27.1% | 17.8% | 1973 | $602 | 17.2% | 93.3% | 8.1% |
| Du Quoin | 2.44 | 40.0 | 16.0% | 27.4% | 14.1% | 1968 | $756 | 13.9% | 89.5% | 6.7% |
| Old Du Quoin | 2.26 | 46.8 | 6.7% | 17.3% | 5.6% | 1975 | $817 | 23.7% | 90.7% | 0.4% |
| Sunfield | 2.39 | 44.5 | 9.9% | 10.7% | 14.5% | 1979 | $595 | 16.2% | 84.2% | 4.5% |
| Dowell | 2.52 | 43.8 | 6.6% | 18.4% | 11.3% | 1981 | $956 | 16.9% | 92.4% | 5.2% |
| Tamaroa | 2.29 | 45.4 | 10.3% | 11.2% | 13.4% | 1976 | $827 | 11.1% | 85.5% | 2.3% |
| Elkville | 2.21 | 44.5 | 13.0% | 28.1% | 13.2% | 1970 | $725 | 8.1% | 84.8% | 6.0% |
| Pinckneyville | 2.26 | 43.6 | 8.8% | 13.0% | 11.9% | 1974 | $612 | 15.1% | 84.7% | 2.0% |
| North City | 2.21 | 53.3 | 2.3% | 13.7% | 12.1% | 1967 | $970 | 10.8% | 91.7% | 9.1% |
| Mulkeytown | 2.00 | 55.9 | 5.0% | 10.4% | 11.8% | 1971 | $963 | 11.7% | 85.5% | 7.1% |
| Vergennes | 2.59 | 42.4 | 12.5% | 18.3% | 10.8% | 1978 | $814 | 18.8% | 95.1% | 6.5% |
All figures 2020–24.
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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. Johns. 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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