Population 221 · Census ACS 2020–24
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Median age by neighborhoodHistory and comparison ↓︎
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Population and households in Round Knob
Household size in Round Knob
| Period | Round Knob | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 2.61 | 2.69 | 2.68 |
| 2010–14 | 2.82 | 2.71 | 2.73 |
| 2015–19 | 2.71 | 2.66 | 2.71 |
| 2020–24 | 2.50 | 2.58 | 2.65 |
| Change | −0.12 | −0.11 | −0.03 |
Households in Round Knob run a little small, averaging 2.50 people against 2.65 nationally, which usually means more singles and couples and fewer children. Since 2006–10, household size has dropped from 2.61, but in a place this small, survey estimates can swing a lot from one release to the next.
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 Round Knob
| Period | Round Knob | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 45.6 | 37.6 | 37.7 |
| 2010–14 | 43.3 | 38.5 | 38.6 |
| 2015–19 | 40.2 | 39.6 | 39.6 |
| 2020–24 | 49.4 | 40.2 | 40.1 |
| Change | +3.9 | +2.6 | +2.3 |
With a median age of 49.4, Round Knob is noticeably older than the country as a whole (40.1), an age mix that tilts toward empty nesters and retirees.
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 Round Knob
| Period | Round Knob | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 7.6% | 11.7% | 12.3% |
| 2010–14 | 14.5% | 11.7% | 12.3% |
| 2015–19 | 3.1% | 11.1% | 11.6% |
| 2020–24 | 4.2% | 11.3% | 11.6% |
| Change | −3.5 pts | −0.4 pts | −0.6 pts |
Single parents head only 4.2% of households in Round Knob, well below the national share of 11.6%.
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 Round Knob
Renters in Round Knob
| Period | Round Knob | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 10.5% | 30.8% | 33.3% |
| 2010–14 | 7.5% | 33.1% | 35.6% |
| 2015–19 | 11.9% | 33.9% | 36.0% |
| 2020–24 | 3.6% | 32.9% | 34.8% |
| Change | −6.9 pts | +2.1 pts | +1.5 pts |
Only 3.6% of households in Round Knob rent their homes, far below the national share of 34.8%, so most residents are owners who tend to stay put. About six in ten owners (59.5%) have paid off their mortgages, 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 Round Knob
| Period | Round Knob | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 16.8% | 10.0% | 11.4% |
| 2010–14 | 18.2% | 10.1% | 11.4% |
| 2015–19 | 12.1% | 9.8% | 11.1% |
| 2020–24 | 20.5% | 8.1% | 9.6% |
| Change | +3.7 pts | −1.9 pts | −1.8 pts |
Vacant homes make up 20.5% of the housing in Round Knob, 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 Round Knob
| Period | Round Knob | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 1976 | 1966 | 1974 |
| 2010–14 | 1980 | 1967 | 1975 |
| 2015–19 | 1983 | 1968 | 1977 |
| 2020–24 | 1980 | 1970 | 1980 |
| Change | +4 | +4 | +6 |
Homes in Round Knob are the same age as the nation's housing: the median home was built in 1980. Homes here are newer than in Illinois as a whole, where the median home dates to 1970.
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 Round Knob
| Period | Round Knob | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | $684 | $953 | $965 |
| 2010–14 | $820 | $1,028 | $1,040 |
| 2015–19 | $840 | $1,165 | $1,213 |
| 2020–24 | $736 | $1,428 | $1,571 |
| Change | +$52 | +$475 | +$606 |
The median renter in Round Knob pays $736 a month for rent and utilities, well below the national median of $1,571. The typical renter here spends 24.9% of household income on rent, comfortably under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally.
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 Round Knob
Bachelor's degrees in Round Knob
| Period | Round Knob | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 17.3% | 31.2% | 28.4% |
| 2010–14 | 19.0% | 32.4% | 29.6% |
| 2015–19 | 15.0% | 34.7% | 32.1% |
| 2020–24 | 19.3% | 37.7% | 35.6% |
| Change | +2.0 pts | +6.5 pts | +7.2 pts |
College degrees are relatively uncommon in Round Knob: 19.3% of adults 25 and older hold a bachelor's or higher, well below the national share of 35.6%.
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 Round Knob
| Period | Round Knob | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 91.6% | 86.3% | 84.9% |
| 2010–14 | 84.8% | 87.5% | 86.1% |
| 2015–19 | 94.3% | 89.1% | 87.7% |
| 2020–24 | 97.9% | 90.3% | 89.3% |
| Change | +6.2 pts | +4.0 pts | +4.3 pts |
Finishing high school is nearly universal in Round Knob: 97.9% of adults 25 and older have a diploma or equivalent, well above the national rate of 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 Round Knob
| Period | Round Knob | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 5.3% | 8.7% | 8.1% |
| 2010–14 | 8.5% | 10.2% | 9.4% |
| 2015–19 | 4.7% | 6.1% | 5.6% |
| 2020–24 | 2.2% | 6.0% | 5.4% |
| Change | −3.0 pts | −2.7 pts | −2.7 pts |
The job market in Round Knob has been strong: just 2.2% of the labor force was out of work and looking, well below the national rate of 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).
Round Knob 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Round Knob | 2.50 | 49.4 | 4.2% | 3.6% | 20.5% | 1980 | $736 | 19.3% | 97.9% | 2.2% |
| New Columbia | 2.53 | 46.3 | 1.8% | 0.0% | 22.0% | 1990 | $736 | 26.8% | 97.1% | 2.3% |
| Metropolis | 2.52 | 43.9 | 14.0% | 27.2% | 18.9% | 1974 | $753 | 17.7% | 91.1% | 3.2% |
| Temple Hill | 2.66 | 54.6 | 4.4% | 1.2% | 31.1% | 1984 | $474 | 20.3% | 95.5% | 3.2% |
| Mermet | 2.47 | 47.8 | 6.0% | 7.3% | 18.6% | 1980 | $749 | 17.6% | 95.7% | 9.3% |
| Joppa | 2.41 | 48.9 | 10.7% | 15.9% | 14.8% | 1971 | $765 | 7.9% | 93.7% | 18.3% |
| Grinnell | 2.53 | 46.3 | 1.8% | 0.0% | 22.0% | 1990 | $736 | 26.8% | 97.1% | 2.3% |
| Reevesville | 2.82 | 43.9 | 13.3% | 11.1% | 23.3% | 1984 | $506 | 18.5% | 92.7% | 3.2% |
| Grantsburg | 2.83 | 34.1 | 17.8% | 23.8% | 20.7% | 1981 | $623 | 17.7% | 87.3% | 7.8% |
| Hillerman | 2.45 | 47.2 | 11.2% | 17.4% | 14.6% | 1971 | $776 | 8.9% | 92.8% | 20.2% |
| Grahamville | 2.80 | 36.2 | 8.4% | 16.3% | 3.8% | 1985 | $960 | 17.6% | 87.8% | 0.8% |
All figures 2020–24.
Cities with similar populations: Johnson City, MO · Jamesville, VA · Jarrell, GA · Java, SD · Jefferson Estates, OH · Jennings, MD · Jennys, SC · Jericho, AR · Jerusalem, NC · Johnnie, NV
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 Round Knob. 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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