Somonauk Flag

Somonauk

County:
DeKalb County
County Seat:
No
Area (mi²):
19.265
State:
Illinois

Somonauk is located in DeKalb County, Illinois. Somonauk has a 2025 population of 1,941. Somonauk is currently declining at a rate of -0.67% annually and its population has decreased by -2.76% since the most recent census, which recorded a population of 1,996 in 2020.

The average household income in Somonauk is $112,366 with a poverty rate of 3.7%. The median age in Somonauk is 45.5 years: 46.4 years for males, and 43 years for females.

1.9K
Total Population
101
Density (mi²)
-13 -0.67%
Growth

Somonauk Population

Somonauk Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Somonauk includes 94.84% White, and smaller percentages for other race, Black or African American and multiracial populations.

Population by Race

White (94.8%)

Two or more races (3.1%)

Other race (1.4%)

Black or African American (0.7%)

Race
Population
Percentage (of total)
White1,69194.84%
Two or more races563.14%
Other race241.35%
Black or African American120.67%

Somonauk Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Somonauk's average per capita income is $54,341. Household income levels show a median of $95,500. The poverty rate stands at 3.7%.

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$112,411-
Families$103,333$128,790
Households$95,500$112,366
Non Families$54,071$67,251

$54,341

Average Income

$95,500

Median Household Income

3.7%

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)