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, Native American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Other race

Black or African American

Native American

Asian

Native Hawaiian or Pacific Islander

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%
Native American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%

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