Population 13,376 · Census ACS 2020–24
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Population and households in Johnson County
Household size in Johnson County
| Period | Johnson County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 2.03 | 2.69 | 2.68 |
| 2010–14 | 2.27 | 2.71 | 2.73 |
| 2015–19 | 2.67 | 2.66 | 2.71 |
| 2020–24 | 2.75 | 2.58 | 2.65 |
| Change | +0.72 | −0.11 | −0.03 |
The typical household in Johnson County holds 2.75 people, slightly more than the U.S. average of 2.65. Since 2006–10, household size has climbed from 2.03, even as the national average fell. Only six of Illinois' 102 counties have larger households.
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 Johnson County
| Period | Johnson County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 42.5 | 37.6 | 37.7 |
| 2010–14 | 43.3 | 38.5 | 38.6 |
| 2015–19 | 45.6 | 39.6 | 39.6 |
| 2020–24 | 41.6 | 40.2 | 40.1 |
| Change | −0.8 | +2.6 | +2.3 |
The median resident of Johnson County is 41.6 years old, a bit older than the national median of 40.1. Since 2006–10, the median age has edged down from 42.5, even as the national median rose. The youngest areas are in the south, the oldest in the north.
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 Johnson County
| Period | Johnson County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 6.0% | 11.7% | 12.3% |
| 2010–14 | 7.6% | 11.7% | 12.3% |
| 2015–19 | 25.8% | 11.1% | 11.6% |
| 2020–24 | 10.5% | 11.3% | 11.6% |
| Change | +4.5 pts | −0.4 pts | −0.6 pts |
Single-parent households are a bit less common in Johnson County than nationally: 10.5%, against 11.6%. The picture is much the same across Illinois. The single-parent share has risen 4.5 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 Johnson County
Renters in Johnson County
| Period | Johnson County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 20.2% | 30.8% | 33.3% |
| 2010–14 | 18.6% | 33.1% | 35.6% |
| 2015–19 | 15.8% | 33.9% | 36.0% |
| 2020–24 | 18.0% | 32.9% | 34.8% |
| Change | −2.2 pts | +2.1 pts | +1.5 pts |
Only 18.0% of households in Johnson County rent their homes, far below the national share of 34.8%, so most residents are owners who tend to stay put. Among homeowners, 64.1% have no mortgage at all, well above the national share of 39.8%. Rentals cluster in the center; owners are most common in the north. The renter share has fallen 2.2 points since 2006–10, even as the national share rose.
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 Johnson County
| Period | Johnson County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 29.1% | 10.0% | 11.4% |
| 2010–14 | 20.5% | 10.1% | 11.4% |
| 2015–19 | 31.9% | 9.8% | 11.1% |
| 2020–24 | 30.2% | 8.1% | 9.6% |
| Change | +1.1 pts | −1.9 pts | −1.8 pts |
Vacancy is high in Johnson County: 30.2% of homes are empty, 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. Since 2006–10, vacancy has edged up 1.1 points, even as the national rate fell.
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 Johnson County
| Period | Johnson County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 1972 | 1966 | 1974 |
| 2010–14 | 1970 | 1967 | 1975 |
| 2015–19 | 1979 | 1968 | 1977 |
| 2020–24 | 1978 | 1970 | 1980 |
| Change | +6 | +4 | +6 |
Homes in Johnson County are about the same age as the nation's housing: the median home was built in 1978, versus 1980 nationally. Homes here are newer than in Illinois as a whole, where the median home dates to 1970. The median year built has moved up from 1972 in 2006–10, a sign of steady new building.
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 Johnson County
| Period | Johnson County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | $461 | $953 | $965 |
| 2010–14 | $635 | $1,028 | $1,040 |
| 2015–19 | $613 | $1,165 | $1,213 |
| 2020–24 | $896 | $1,428 | $1,571 |
| Change | +$435 | +$475 | +$606 |
The median renter in Johnson County pays $896 a month for rent and utilities, well below the national median of $1,571. Rent has climbed $435 a month since 2006–10, up 94%, faster than rents rose nationally. The typical renter here spends 30.0% of household income on rent, just over the 30% mark often used to define affordable rent. Rents run highest in the northeast and lowest in the south.
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 Johnson County
Bachelor's degrees in Johnson County
| Period | Johnson County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 15.9% | 31.2% | 28.4% |
| 2010–14 | 15.5% | 32.4% | 29.6% |
| 2015–19 | 16.2% | 34.7% | 32.1% |
| 2020–24 | 21.8% | 37.7% | 35.6% |
| Change | +5.9 pts | +6.5 pts | +7.2 pts |
Fewer adults in Johnson County have a four-year degree than in the country as a whole: 21.8%, against 35.6% nationally. Since 2006–10, the share with a degree has risen 5.9 points, in line with the national trend. College graduates are most concentrated in the north and least in the southwest.
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 Johnson County
| Period | Johnson County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 77.2% | 86.3% | 84.9% |
| 2010–14 | 82.6% | 87.5% | 86.1% |
| 2015–19 | 82.9% | 89.1% | 87.7% |
| 2020–24 | 86.9% | 90.3% | 89.3% |
| Change | +9.8 pts | +4.0 pts | +4.3 pts |
About one in eight adults in Johnson County never finished high school, a bit more than nationally: 86.9% have a diploma or equivalent, against 89.3% across the U.S. The share with a diploma is up 9.8 points from 2006–10, as it has nationally. Few Illinois counties have a lower share of high school graduates: only seven of 102.
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 Johnson County
| Period | Johnson County | Illinois | U.S. |
|---|---|---|---|
| 2006–10 | 6.2% | 8.7% | 8.1% |
| 2010–14 | 8.9% | 10.2% | 9.4% |
| 2015–19 | 4.5% | 6.1% | 5.6% |
| 2020–24 | 10.2% | 6.0% | 5.4% |
| Change | +4.1 pts | −2.7 pts | −2.7 pts |
Finding work has been harder in Johnson County: 10.2% of the labor force was out of work and looking, well above the national rate of 5.4%. Johnson County has the highest unemployment rate of any Illinois county. Unemployment is up 4.1 points from 2006–10, even as the national rate fell.
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).
Johnson 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Johnson County | 2.75 | 41.6 | 10.5% | 18.0% | 30.2% | 1978 | $896 | 21.8% | 86.9% | 10.2% |
| Pope County | 2.65 | 53.5 | 6.3% | 13.7% | 38.2% | 1983 | $475 | 15.0% | 93.6% | 2.6% |
| Union County | 2.43 | 43.5 | 10.2% | 22.6% | 13.1% | 1977 | $747 | 20.4% | 86.8% | 4.2% |
| Hardin County | 2.27 | 53.4 | 9.3% | 20.5% | 33.7% | 1974 | $444 | 13.1% | 91.8% | 2.8% |
| Cape Girardeau County | 2.53 | 39.4 | 9.0% | 33.2% | 11.4% | 1982 | $983 | 33.3% | 92.5% | 2.6% |
| Crittenden County | 2.56 | 43.5 | 11.4% | 21.8% | 16.4% | 1976 | $788 | 15.1% | 83.6% | 3.2% |
| Bollinger County | 2.68 | 43.7 | 10.0% | 17.7% | 20.8% | 1982 | $776 | 13.1% | 90.6% | 3.5% |
| Webster County | 2.68 | 40.2 | 11.2% | 26.2% | 13.9% | 1980 | $857 | 12.4% | 85.1% | 5.5% |
| Hopkins County | 2.44 | 40.8 | 14.6% | 29.3% | 13.1% | 1977 | $824 | 17.3% | 88.1% | 6.3% |
| Madison County | 2.76 | 41.0 | 11.6% | 26.3% | 17.9% | 1975 | $812 | 16.9% | 88.0% | 4.5% |
| McLean County | 2.49 | 42.6 | 6.6% | 17.2% | 13.8% | 1978 | $635 | 16.7% | 91.4% | 5.0% |
All figures 2020–24.
Counties with similar populations: Clay County, TN · Tipton County, IN · Tippah County, MS · Texas County, OK · Clinch County, GA · Clearwater County, MN · Clearwater County, ID · Clear Creek County, CO · Clayton County, IA · Clay County, WV
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 Johnson 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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