South Wilmington Flag

South Wilmington

County:
Grundy County
County Seat:
No
Area (mi²):
0.492
State:
Illinois

South Wilmington is a village located in Grundy County, Illinois. South Wilmington has a 2026 population of 721. South Wilmington is currently growing at a rate of 0.28% annually and its population has increased by 1.98% since the most recent census, which recorded a population of 707 in 2020.

The median household income in South Wilmington is $86,750 with a poverty rate of 5.67%. The median age in South Wilmington is 43 years: 34.9 years for males, and 49.6 years for females. For every 100 females there are 115.1 males.

721
Total Population
1,466
Density (mi²)
2 0.28%
Growth

South Wilmington Population

South Wilmington Population

Year ↓
Population
Growth
Annual Change
202672120.28%
202571910.14%
202471800%
202371820.28%
2022716-1-0.14%
2021717101.41%
2020707-2-0.28%
2019643-6-0.92%
2018649-3-0.46%
2017652-4-0.61%
2016656-4-0.61%
2015660-6-0.9%
2014666-3-0.45%
2013669-5-0.74%
2012674-2-0.3%
2011676-5-0.73%
201068210.15%

Median Age

Overall: 43 years
Female: 49.6 years
Male: 34.9 years

South Wilmington Adults

There are 479 adults, (111 of whom are seniors) in South Wilmington.

Sex Ratio

Female: 279 (46.5%)
Male: 321 (53.5%)

Demographics

The racial composition of South Wilmington includes 98.5% White, and smaller percentages for Two or more races, Asian and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White59198.5%
Two or more races50.83%
Asian40.67%
Race
Population ↓
Percentage (of total)
White233.83%
Race
Population ↓
Percentage (of total)
White56894.67%
Two or more races50.83%
Asian40.67%

South Wilmington Marital Status

Economics and Income Statistics

South Wilmington's average per capita income is $56,250. Household income levels show a median of $86,750. The poverty rate stands at 5.67%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median ↓
Mean
Married Families$105,000-
Families$100,000$112,928
Households$86,750$102,263
Non Families$59,375$83,058

$56,250

Average Income

$86,750

Median Household Income

5.67%

Poverty Rate

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)