Somonauk township Flag

Somonauk township

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

Somonauk township is located in DeKalb County, Illinois. Somonauk township has a 2026 population of 1,972. Somonauk township is currently declining at a rate of -0.05% annually and its population has decreased by -1.25% since the most recent census, which recorded a population of 1,997 in 2020.

The median household income in Somonauk township is $100,119 with a poverty rate of 2.35%. The median age in Somonauk township is 44.5 years: 45.4 years for males, and 42.5 years for females. For every 100 females there are 98.8 males.

2K
Total Population
102
Density (mi²)
-1 -0.05%
Growth

Somonauk township Population

Somonauk township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20261,972-1-0.05%
20251,973-1-0.05%
20241,974-1-0.05%
20231,975-12-0.6%
20221,987-10-0.5%
20211,99700%
20201,997-4-0.2%
20192,10390.43%
20182,094-2-0.1%
20172,09650.24%
20162,091-1-0.05%
20152,092-5-0.24%
20142,09790.43%
20132,088-1-0.05%
20122,08910.05%
20112,088-13-0.62%
20102,103-1-0.05%

Median Age

Overall: 44.5 years
Female: 42.5 years
Male: 45.4 years

Somonauk township Adults

There are 1,445 adults, (378 of whom are seniors) in Somonauk township.

Sex Ratio

Female: 919 (50.3%)
Male: 908 (49.7%)

Demographics

The racial composition of Somonauk township includes 91.3% White, 4.76% other race, and smaller percentages for Black or African American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White1,66891.3%
Other race874.76%
Two or more races603.28%
Black or African American120.66%
Race
Population ↓
Percentage (of total)
Other race482.63%
White140.77%
Two or more races120.66%
Race
Population ↓
Percentage (of total)
White1,65490.53%
Two or more races482.63%
Other race392.13%
Black or African American120.66%

Somonauk township Marital Status

Economics and Income Statistics

Somonauk township 's average per capita income is $56,196. Household income levels show a median of $100,119. The poverty rate stands at 2.35%.

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$126,250-
Families$114,545$133,575
Households$100,119$116,276
Non Families$56,048$67,627

$56,196

Average Income

$100,119

Median Household Income

2.35%

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)