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 2025 population of 717 . South Wilmington is currently growing at a rate of 0.28% annually and its population has increased by 1.85% since the most recent census, which recorded a population of 704 in 2020.

The average household income in South Wilmington is $99,435 with a poverty rate of 6.45%. The median age in South Wilmington is 46.3 years: 42.7 years for males, and 47.7 years for females. For every 100 females there are 106.7 males.

717
Total Population
1,458
Density (mi²)
2 0.28%
Growth

South Wilmington Population

South Wilmington Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of South Wilmington includes 98.57% White, and smaller percentages for Two or more races, Asian and multiracial populations.

Population by Race

White (98.57%)

Two or more races (1.08%)

Asian (0.36%)

Race
Population
Percentage (of total)
White55098.57%
Two or more races61.08%
Asian20.36%

South Wilmington Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

South Wilmington's average per capita income is $60,000. Household income levels show a median of $86,563. The poverty rate stands at 6.45%.

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$105,781-
Families$105,469$114,878
Households$86,563$99,435
Non Families$46,250$57,803

$60,000

Average Income

$86,563

Median Household Income

6.45%

Poverty Rate

Nearby Cities

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)