Johnston City, Illinois Demographics & Population 2026
During the 2020–2024 ACS period, Johnston City, Illinois had a total population of 3,327, the 412th largest city in Illinois, with a median household income of $42,465, which is 49% lower than the state average. The poverty rate is 17.8%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 49% below the state average, indicating significant economic challenges.
- Housing is very affordable with a home-value-to-income ratio of just 2.1x.
- Unemployment rate of 8.3% is notably above the national average.
Johnston City Quick Facts
How Johnston City Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 3,351 | 3,327 | -0.7% |
| Median household income | $46,629 | $42,465 | -8.9% |
| Median home value | $84,500 | $88,100 | +4.3% |
How Johnston City Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 61 | National average: 61
Education
Educational Attainment (Adults 25+)
Johnston City Rankings in Illinois
Explore Illinois Rankings
Other Cities in Williamson County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Carbondale | 22,158 | $32,128 | 37.4% | $127,900 |
| Marion | 16,836 | $56,912 | 13.3% | $158,300 |
| Herrin | 12,226 | $59,975 | 14.5% | $113,300 |
| Carterville | 5,818 | $62,337 | 10.9% | $197,100 |
| Crainville | 1,641 | $65,461 | 10.2% | $185,300 |
| Cambria | 1,300 | $57,756 | 18.5% | $143,800 |
| Energy | 1,050 | $65,357 | 15.2% | $151,800 |
| Hurst | 700 | $36,635 | 31.4% | $68,600 |
| Pittsburg | 682 | $53,203 | 17.9% | $129,200 |
| Stonefort | 422 | $56,477 | 11.6% | $65,700 |
Cities Similar to Johnston City
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Gibson City | 3,434 | $42,955 | $153,800 | 13.8% | 14.3% |
| South Jacksonville | 3,239 | $49,587 | $135,800 | 24.3% | 9.0% |
| Havana | 2,989 | $41,184 | $95,300 | 14.2% | 24.0% |
| Fulton | 3,709 | $45,581 | $121,700 | 21.2% | 14.8% |
| Dixmoor | 2,948 | $44,600 | $84,400 | 8.1% | 23.6% |
Population Overview
Johnston City is a small community located in Illinois, within Williamson County. The total population is 3,327. It ranks as the 412th most populous out of 1,445 Census-designated places in Illinois.
Age Demographics
The median age in Johnston City is 38.3 years. This is 2% lower than the state median of 39.0 years. 11.8% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.
Economy, Income & Housing
The median household income in Johnston City is $42,465. This is 49% lower than the state median of $83,390. It is also 47% lower than the national median of $80,734. The poverty rate stands at 17.8%. This is 51% higher than the state poverty rate of 11.8%. The unemployment rate is 8.3%. This is 41% higher than the state rate of 5.8%. The median home value is $88,100. Housing costs are 67% lower than the state median of $263,300. With a home-value-to-income ratio of just 2.1x, Johnston City is one of the most affordable housing markets in the area. 71.4% of occupied housing units are owner-occupied. This homeownership rate is 6% higher than the state average of 67.1%.
Race & Ethnicity
Johnston City has a predominantly White (non-Hispanic) population, comprising 90.3% of all residents. Asian residents account for 2.6%. The White (non-Hispanic) population is significantly higher than the state average (90.3% vs 58.1%). The Black or African American population (0.8%) is well below the state average of 13.3%. The Hispanic or Latino population (1.7%) is well below the state average of 18.8%. The Asian population (2.6%) is well below the state average of 5.9%.
Education
19.2% of residents aged 25 and older hold a bachelor's degree or higher. This is 49% lower than the state rate of 37.9%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 88.9%.
Data Sources & Methodology
All demographic data for Johnston City, Illinois is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Illinois state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,445 Census-designated places in Illinois. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
Free data download: Get all Illinois city and county demographics as CSV. Download Cities CSV | Download Counties CSV
Frequently Asked Questions
What is the population of Johnston City, Illinois?
Johnston City, Illinois has a population of 3,327 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Johnston City, IL?
The median household income in Johnston City is $42,465, which is 47% lower than the national median of $80,734.
What is the poverty rate in Johnston City, IL?
The poverty rate in Johnston City is 17.8%. This means approximately 594 residents live below the federal poverty line.
What is the racial makeup of Johnston City, Illinois?
Johnston City's population is 90.3% White, 0.8% Black, 1.7% Hispanic/Latino, and 2.6% Asian.
What is the median home value in Johnston City, IL?
The median home value in Johnston City is $88,100. The home-value-to-income ratio is 2.1x.
How educated is Johnston City, Illinois?
19.2% of adults (25+) in Johnston City hold a bachelor's degree or higher, and 10.3% hold a graduate or professional degree.