With 3,327 people, Johnston City is a city in Illinois. 19% of adults hold a bachelor's degree, below the 36% national rate. Households here earn about 49% less than in Illinois as a whole. Home values have more than doubled since 2000, reaching $88,100. Getting to work takes 14 minutes on average. The foreign-born share is 2%.
At a glance
Lower income
median household income $42,465, below the US median
US median: $82,259
Mid-age
median age 38.3
US median: 38.9
Less educated
19% hold a bachelor's degree
US average: 36%
Less affordable
home values up 35%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Johnston City
What changed most since 1990
White share98.9% → 90.4%(−8.6 pts)US over the same years: −17.8 pts
Population3,706 → 3,327(−10%)US over the same years: +35%
Median home value (2024 dollars)$69,842 → $88,100(+26%)US over the same years: +67%
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)5.8%(9)
US avg: 26.4%
Gulf War (1990s)35.5%(55)
US avg: 24.3%
Vietnam era0%(0)
US avg: 33.1%
Korean War0%(0)
US avg: 4.5%
World War II0%(0)
US avg: 1%
Share of the 155 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
Johnston City, decade by decade
Johnston City population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
3,706
$39,359
$69,842
7.2%
2.6
2000
3,557
$45,802
$65,033
7.5%
4.6
2010
3,543
$51,583
$79,121
7.7%
8.7
2020
3,384
$45,451
$79,146
18.1%
24.7
2024
3,327
$42,465
$88,100
19.2%
22.6
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
