Wilmington, Illinois Demographics & Population 2026
During the 2020–2024 ACS period, Wilmington, Illinois had a total population of 5,494, the 318th largest city in Illinois, with a median household income of $66,154, which is 21% lower than the state average. The poverty rate is 11.5%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Wilmington Quick Facts
How Wilmington 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 | 5,507 | 5,494 | -0.2% |
| Median household income | $63,514 | $66,154 | +4.2% |
| Median home value | $216,400 | $223,800 | +3.4% |
How Wilmington 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+)
Wilmington Rankings in Illinois
Explore Illinois Rankings
Other Cities in Will County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Joliet | 150,445 | $92,201 | 11.1% | $265,800 |
| Plainfield | 46,708 | $144,000 | 4.2% | $431,400 |
| Romeoville | 41,152 | $106,325 | 5.5% | $257,100 |
| Oswego | 36,375 | $123,792 | 2.6% | $344,500 |
| New Lenox | 28,006 | $140,865 | 1.5% | $399,900 |
| Lockport | 26,409 | $111,981 | 6.8% | $316,000 |
| Crest Hill | 20,628 | $73,033 | 12.0% | $232,900 |
| Mokena | 20,021 | $123,889 | 4.5% | $401,400 |
| Shorewood | 18,343 | $122,105 | 5.2% | $337,800 |
| Channahon | 13,927 | $119,494 | 5.9% | $327,900 |
Cities Similar to Wilmington
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Spring Valley | 5,476 | $70,598 | $153,300 | 16.9% | 7.1% |
| Carlinville | 5,480 | $57,708 | $105,700 | 23.4% | 20.5% |
| Chillicothe | 5,900 | $66,132 | $132,900 | 26.4% | 3.7% |
| Coal City | 5,317 | $72,857 | $201,600 | 23.2% | 4.4% |
| Carterville | 5,818 | $62,337 | $197,100 | 46.7% | 10.9% |
Population Overview
Wilmington is a small city located in Illinois, within Will County. The total population is 5,494. It ranks as the 318th most populous out of 1,445 Census-designated places in Illinois.
Age Demographics
The median age in Wilmington is 40.3 years. This is 3% higher than the state median of 39.0 years. 10.5% 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 Wilmington is $66,154. This is 21% lower than the state median of $83,390. It is also 18% lower than the national median of $80,734. The poverty rate stands at 11.5%. This is 3% lower than the state poverty rate of 11.8%. The unemployment rate is 4.7%. This is 20% lower than the state rate of 5.8%. The median home value is $223,800. Housing costs are 15% lower than the state median of $263,300. The home-value-to-income ratio is 3.4x. 64.4% of occupied housing units are owner-occupied. This homeownership rate is 4% lower than the state average of 67.1%.
Race & Ethnicity
The largest racial or ethnic group in Wilmington is White (non-Hispanic), making up 84.0% of the population. Hispanic or Latino residents account for 9.4%. The Black or African American population (2.7%) is well below the state average of 13.3%. The Asian population (0.8%) is well below the state average of 5.9%.
Education
19.8% of residents aged 25 and older hold a bachelor's degree or higher. This is 48% 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 92.7%.
Data Sources & Methodology
All demographic data for Wilmington, 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.
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Frequently Asked Questions
What is the population of Wilmington, Illinois?
Wilmington, Illinois has a population of 5,494 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Wilmington, IL?
The median household income in Wilmington is $66,154, which is 18% lower than the national median of $80,734.
What is the poverty rate in Wilmington, IL?
The poverty rate in Wilmington is 11.5%. This means approximately 608 residents live below the federal poverty line.
What is the racial makeup of Wilmington, Illinois?
Wilmington's population is 84.0% White, 2.7% Black, 9.4% Hispanic/Latino, and 0.8% Asian.
What is the median home value in Wilmington, IL?
The median home value in Wilmington is $223,800. The home-value-to-income ratio is 3.4x.
How educated is Wilmington, Illinois?
19.8% of adults (25+) in Wilmington hold a bachelor's degree or higher, and 6.7% hold a graduate or professional degree.