Somonauk

County:: DeKalb County
County Seat:: No
Area (mi²):: 2.501
State:: Illinois

Somonauk is a village located in DeKalb County, Illinois. Somonauk has a 2025 population of 1,743. Somonauk is currently declining at a rate of -0.46% annually and its population has decreased by -2.35% since the most recent census, which recorded a population of 1,785 in 2020.

The average household income in Somonauk is $100,081 with a poverty rate of 5.9%.The median age in Somonauk is 46.1 years: 45.3 years for males, and 47 years for females.

Demographics

The racial composition of Somonauk includes 92.46% White, and smaller percentages for other race, Black or African American and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	1,472	92.46%
Two or more races	69	4.33%
Other race	36	2.26%
Black or African American	15	0.94%

Somonauk Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Somonauk's average per capita income is $51,359. Household income levels show a median of $81,731. The poverty rate stands at 5.9%.

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	$102,000	-
Families	$96,310	$117,400
Households	$81,731	$100,081
Non Families	$52,500	$60,752

$51,359

Average Income

$81,731

Median Household Income

5.9%

Poverty Rate