Somonauk ZIP Codes — Dekalb County, IL

There is one unique ZIP code in Somonauk, Illinois and it is 60552. Area code: 815.

ZIP codes

26.61

sq mi land

0.27

sq mi water

815

area code

Somonauk, IL ZIP code map

About Somonauk, IL

Somonauk, Illinois, is a charming village located in Dekalb County. Known for its small-town feel, it provides a peaceful atmosphere for residents and visitors alike. The village offers a variety of local amenities and serves as a quaint community hub for surrounding areas.

Location & geography

Somonauk is situated approximately 10 miles south of the larger city of DeKalb and about 15 miles from the bustling town of Sandwich. This picturesque village occupies a land area of 26.61 square miles, complemented by a small water area of 0.27 square miles. The terrain is characteristic of northern Illinois, featuring a blend of rural landscapes and open fields.

Community & economy

The community of Somonauk is known for its friendly residents and strong sense of local pride. It is primarily supported by agriculture and small businesses, contributing to a vibrant local economy. Daily life in Somonauk is marked by community events, local gatherings, and an overall close-knit environment.

Transportation

Somonauk is conveniently located near several major highways, including Illinois Route 34, which provides easy access to neighboring cities and regions. The nearest named airport is the Chicago Rockford International Airport, located about 40 miles north of the village. Public transit options may be limited, with most residents relying on personal vehicles for commuting.

History

Founded in the mid-1800s, Somonauk has a rich history tied to agriculture and the development of the surrounding region. The village once thrived as a center for farming and trade, with notable growth through the establishment of the railroad. Significant events in the village's history have shaped its community identity and contributed to its development.

Did you know?

Somonauk is home to a unique historical landmark, the Somonauk Grain Company, which dates back to the early 20th century and plays a vital role in the local agricultural economy. Additionally, the village hosts the popular Somonauk Pumpkin Fest, which attracts visitors each autumn and celebrates the harvest season.

ZIP codes for Somonauk, IL (1)

ZIP code	City	County	Map
60552	Somonauk	Dekalb	View map

Demographics & statistics

4,538

Population

40.2

Median age

$120,944

Median household income

$50,649

Per capita income

$238,200

Median home value

$1,047

Median monthly rent

82.3%

Home ownership

5.1%

Poverty rate

4.3%

Unemployment

1,513

Housing units

29.6%

Bachelor's or higher

Age distribution

Male Female

131

Under 5

152

146

5–9

168

125

10–14

144

170

15–19

196

104

20–24

121

189

25–34

219

268

35–44

310

293

45–54

338

185

55–59

214

143

60–64

165

223

65–74

258

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	971	21.4%
18 and over	3,567	78.6%
65 and over	757	16.7%
Median age	40.2 years

Race & ethnicity

White 93.7%

Two or more races 3%

Black or African American 1%

Hispanic or Latino 0.9%

Other race 0.8%

Asian 0.6%

Group	Count	%
White	4,292	93.7%
Two or more races	138	3%
Black or African American	46	1%
Hispanic or Latino	43	0.9%
Other race	35	0.8%
Asian	27	0.6%

Household income

Under $10k 1.8%

$10k–$15k 2.2%

$15k–$25k 3.9%

$25k–$35k 2.2%

$35k–$50k 6.5%

$50k–$75k 13.1%

$75k–$100k 10.2%

$100k–$150k 31.5%

$150k–$200k 17.7%

$200k+ 11.0%

Range	% of households
Under $10k	1.8%
$10k–$15k	2.2%
$15k–$25k	3.9%
$25k–$35k	2.2%
$35k–$50k	6.5%
$50k–$75k	13.1%
$75k–$100k	10.2%
$100k–$150k	31.5%
$150k–$200k	17.7%
$200k+	11.0%
Median income	$120,944

Housing

Home values

Under $50k 0.7%

$50k–$100k 2.3%

$100k–$150k 4.0%

$150k–$200k 24.9%

$200k–$300k 36.5%

$300k–$500k 26.7%

$500k–$1M 5.0%

Housing overview

Metric	Value
Median home value	$238,200
Median rent / month	$1,047
Owner occupied	82.3%
Renter occupied	17.7%
Vacant	7.8%
Single-family detached	83.5%
Large apartment buildings	0.9%
Mobile homes	0.2%
Median rooms	6.6
Avg household size (owned)	2.74

Year built

Era	%
2020 or later	1.3%
2010–2019	1.3%
2000–2009	11.9%
1990–1999	17.2%
1980–1989	10.9%
1970–1979	19.8%
1960–1969	7.9%
1950–1959	11.4%
1940–1949	2.2%
1939 or earlier	15.9%

Bedrooms

Size	% of units
No bedroom (studio)	0.6%
1 bedroom	2.2%
2 bedrooms	18.9%
3 bedrooms	54.0%
4 bedrooms	22.1%
5+ bedrooms	2.2%

Vehicles per household

Vehicles	% of households
No vehicle	4.9%
1 vehicle	23.4%
2 vehicles	44.4%
3 or more	27.3%

Heating fuel

Fuel type	%
Utility gas	86.0%
Electricity	7.7%
Propane / LP gas	5.7%
Wood	0.5%
No fuel used	0.2%

Households & families

Household type	Count	%
Married-couple family	1,120	67.1%
Cohabiting couple	80	4.8%
Male householder, no spouse	138	8.3%
Female householder, no spouse	330	19.8%
Households with children under 18	502	30.1%
Households with seniors (65+)	530	31.8%
Average household size	2.72

Marital status

Status	Male	Female
Never married	22.0%	24.7%
Married	72.1%	59.5%
Separated	0.0%	0.6%
Widowed	0.8%	5.2%
Divorced	5.1%	10.0%

Education

Less than 9th grade 0.1%

Some HS, no diploma 2.3%

HS graduate 27.8%

Some college, no degree 30.5%

Associate's degree 9.7%

Bachelor's degree 20.5%

Graduate / professional 9.1%

Metric	%
HS diploma or higher	97.6%
Bachelor's or higher	29.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	37	3.5%
Kindergarten	49	4.7%
Elementary school	443	42.2%
High school	226	21.5%
College / grad school	296	28.2%

Employment

Industry of employment

Education & healthcare 19.2%

Retail trade 14.0%

Construction 11.2%

Manufacturing 11.0%

Professional & management 10.3%

Arts, food & hospitality 8.7%

Finance & real estate 7.5%

Transportation & utilities 6.5%

Wholesale trade 4.3%

Public administration 3.5%

Other services 2.3%

Information 1.1%

Agriculture & mining 0.5%

Occupation

Category	%
Management, business & arts	38.9%
Service	15.4%
Sales & office	20.5%
Natural resources & construction	12.9%
Production & transportation	12.4%

Employment type

Type	%
Private sector	88.0%
Government	9.4%
Self-employed	2.4%
Unpaid family workers	0.2%

Commute

Method	%
Drive alone	83.5%
Carpool	6.0%
Public transit	0.6%
Walk	0.8%
Other means	0.6%
Avg commute (minutes)	36.1

Poverty

All people 5.1%

Under 18 years 7.5%

18 and over 4.5%

Married-couple families 0.6%

Female-led households 3.0%

Income support

Source	% of households
Social Security	32.6%
Retirement income	32.9%
Supplemental Security	2.8%
Cash public assistance	1.2%
Food stamps / SNAP	5.6%

Health indicators

Condition	%
High blood pressure	30.9%
High cholesterol	32.4%
Heart disease	5.9%
Stroke	2.7%
Asthma	9.4%
Arthritis	25.3%
Kidney disease	2.6%
Pulmonary disease	6.4%
Cancer	6.7%

Behavior / access	%
Binge drinking	16.4%
No physical activity	21.9%
Less than 7 hrs sleep	31.7%
Fair or poor health	12.2%
Poor mental health	12.6%
Poor physical health	9.1%
No health insurance	9.9%
Visited doctor (checkup)	75.7%
Visited dentist	67.0%
Cholesterol screening	90.0%
Teeth loss	12.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	159	4.5%

Disability	%
Any disability	8.6%
Under 18	1.9%
18–64 years	5.2%
65 and over	29.5%

Health insurance coverage

Type	%
Private insurance	86.6%
Public insurance	25.1%
Uninsured under 19	2.3%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	4,255	93.8%
Spanish	10	0.2%
Other Indo-European	10	0.2%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	4,430	97.6%
Born in same state	4,430	97.6%
Born in different state	3,894	85.8%
Foreign born	0	0.0%
Naturalized citizen	108	2.4%
Not a US citizen	55	50.9%

Ancestry

Ancestry	Count	%
Italian	971	21.4%
French	402	8.9%
Polish	355	7.8%
Arab	271	6%

Ancestry	Count	%
Norwegian	90	2%
Dutch	26	0.6%
Irish	23	0.5%
English	16	0.4%

Technology access

Metric	% of households
Computer access	36.8%
Internet access	97.2%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions

What ZIP codes does Somonauk, IL have?

Somonauk, IL has one ZIP code: 60552. Each ZIP code serves a distinct delivery area within the city and surrounding region.