Johnson County vs Mason County
A side-by-side comparison of Johnson County and Mason County: population, income, housing, and more.
Johnson County and Mason County are counties in Illinois. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.
Johnson County has the higher population (13,350 vs 12,878 in Mason County). Johnson County has the higher median household income ($65,203 vs $62,127 in Mason County). Johnson County has the higher median home value ($148,200 vs $106,100 in Mason County).
Population, income & housing
| Johnson County | Mason County | |
|---|---|---|
| Population | 13,350 | 12,878 |
| Median age | 42.7 yrs | 45.5 yrs |
| Median household income | $65,203 | $62,127 |
| Median home value | $148,200 | $106,100 |
| Median gross rent | $634 | $760 |
| Housing units | 5,538 | 6,615 |
| Homeownership rate | 84.7% | 80.6% |
| Bachelor's degree or higher | 18.8% | 17.1% |
| Unemployment rate | 2.4% | 6.1% |
Trends (ACS 5-year, 2019–2023)
| Johnson County | Mason County | |
|---|---|---|
| Population | 12,494 → 13,350 (+6.9%) | 13,621 → 12,878 (-5.5%) |
| Median household income | $52,774 → $65,203 (+23.6%) | $48,417 → $62,127 (+28.3%) |
| Median home value | $109,500 → $148,200 (+35.3%) | $83,000 → $106,100 (+27.8%) |
| Median gross rent | $663 → $634 (-4.4%) | $664 → $760 (+14.5%) |
Johnson County
12,49413,350
$52,774$65,203
$109,500$148,200
$663$634
Mason County
13,62112,878
$48,417$62,127
$83,000$106,100
$664$760
Age & race/ethnicity
Age distribution (share)
| Johnson County | Mason County | |
|---|---|---|
| Under 5 | 4.2% | 4.6% |
| 5 to 17 | 13.5% | 15.9% |
| 18 to 24 | 9.6% | 6.9% |
| 25 to 34 | 13.1% | 10.8% |
| 35 to 44 | 12.6% | 11.2% |
| 45 to 54 | 11.7% | 12.5% |
| 55 to 64 | 14.7% | 15.2% |
| 65 to 74 | 11.7% | 12.8% |
| 75 and over | 8.7% | 10.2% |
Race & ethnicity (share)
| Johnson County | Mason County | |
|---|---|---|
| White (non-Hispanic) | 81.0% | 95.5% |
| Black or African American | 7.5% | 0.6% |
| American Indian & Alaska Native | 0.0% | 0.2% |
| Asian | 0.2% | 0.1% |
| Native Hawaiian & Pacific Islander | 0.0% | 0.0% |
| Some other race | 0.0% | 0.0% |
| Two or more races | 7.0% | 2.2% |
| Hispanic or Latino | 4.2% | 1.5% |
Educational attainment (age 25+)
Share of adults 25+
| Johnson County | Mason County | |
|---|---|---|
| No high school diploma | 14.1% | 7.9% |
| High school graduate | 32.7% | 38.1% |
| Some college or associate's | 34.4% | 36.9% |
| Bachelor's degree | 12.2% | 12.4% |
| Graduate or professional degree | 6.6% | 4.7% |
Commute to work
How workers get to work (share)
| Johnson County | Mason County | |
|---|---|---|
| Drove alone | 86.1% | 81.4% |
| Carpooled | 6.8% | 7.1% |
| Public transit | 0.0% | 0.2% |
| Walked | 0.3% | 1.5% |
| Bicycle | 0.0% | 0.1% |
| Worked from home | 5.5% | 8.2% |
| Other means | 1.2% | 1.6% |
Housing
Units in structure (share)
| Johnson County | Mason County | |
|---|---|---|
| 1-unit, detached | 70.3% | 90.1% |
| 1-unit, attached | 0.3% | 0.7% |
| 2 to 4 units | 3.3% | 2.4% |
| 5 to 19 units | 1.9% | 2.8% |
| 20 or more units | 1.0% | 0.2% |
| Mobile home & other | 23.3% | 3.8% |
Poverty & households
| Johnson County | Mason County | |
|---|---|---|
| Poverty rate | 16.7% | 14.0% |
| Average household size | 2.78 | 2.21 |
| Mean commute (minutes) | 27 | 29 |
| Median year structure built | 1985 | 1962 |
Full profiles
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