62423 ZIP Code — Dennison, IL

Clark County, Illinois

ZIP code 62423 is located in Dennison, Illinois, within Clark County. It covers approximately 24.36 square miles and serves a population of 843 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 217.

About ZIP code 62423

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $145,500. Owner-occupancy is high at 94%, well above the national average.

Median household income is $75,568. SNAP benefit usage at 19% of households reflects economic stress in the area. 37% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is production, transportation, and material moving, with manufacturing as the leading industry. An above-average commute of 35 minutes suggests many residents work outside the immediate area.

Educational attainment is high — 51% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 62423 reflects a community defined by a highly educated population, high homeownership, a significant Social Security-dependent population, and elevated reliance on food assistance.

843

population

24.36

sq mi land

Standard

ZIP type

Central (CT)

timezone

62423 ZIP code map

Cities in ZIP code 62423

Below are the cities the US Postal Service accepts for ZIP code 62423. Using any city not on this list may result in mail delivery delays.

City	Status
Dennison	Acceptable

Demographics updated 05/2026

Population
Total population	843
Population density	35 / sq mi
State FIPS	17
County FIPS	023

Geography
Land area	24.36 sq mi
Water area	0.02 sq mi
Latitude	39.4630
Longitude	-87.5989
Timezone	Central (CT)
Area code	217

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	19.2%	40.8%	37.2%
$50k – $100k	51.2%	37.1%	29.6%
$100k – $200k	29.6%	20.2%	24.4%
Over $200k	0.0%	2.0%	8.8%

Demographics & statistics

843

Population

People per sq mi

34.9

Median age

$75,568

Median household income

$29,012

Per capita income

$145,500

Median home value

Median monthly rent

93.9%

Home ownership

14.7%

Poverty rate

7.8%

Unemployment

305

Housing units

50.8%

Bachelor's or higher

Age distribution

Male Female

Under 5

112

5–9

15–19

20–24

25–34

35–44

45–54

55–59

60–64

65–74

75–84

← Male

Female →

Age summary

Group	Count	%
Under 18	285	33.8%
18 and over	558	66.2%
65 and over	134	15.9%
Median age	34.9 years

Race & ethnicity

White 98.9%

Two or more races 1.1%

Group	Count	%
White	834	98.9%
Two or more races	9	1.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	19.2%	40.8%	37.2%
$50k – $100k	51.2%	37.1%	29.6%
$100k – $200k	29.6%	20.2%	24.4%
Over $200k	0.0%	2.0%	8.8%

Under $10k 13.5%

$10k–$15k 5.5%

$25k–$35k 5.8%

$35k–$50k 16.7%

$50k–$75k 7.7%

$75k–$100k 27.0%

$100k–$150k 10.3%

$150k–$200k 9.3%

$200k+ 4.2%

Range	% of households
Under $10k	13.5%
$10k–$15k	5.5%
$25k–$35k	5.8%
$35k–$50k	16.7%
$50k–$75k	7.7%
$75k–$100k	27.0%
$100k–$150k	10.3%
$150k–$200k	9.3%
$200k+	4.2%
Median income	$75,568

Housing

Home values

Under $50k 13.4%

$100k–$150k 41.8%

$150k–$200k 23.6%

$200k–$300k 17.5%

$300k–$500k 3.8%

Housing overview

Metric	Value
Median home value	$145,500
Median rent / month	$0
Owner occupied	93.9%
Renter occupied	6.1%
Vacant	4.0%
Single-family detached	77.5%
Large apartment buildings	0.0%
Mobile homes	17.0%
Median rooms	5.7
Avg household size (owned)	2.81

Year built

Era	%
2020 or later	0.0%
2010–2019	16.0%
2000–2009	39.5%
1990–1999	11.7%
1980–1989	10.5%
1970–1979	14.2%
1960–1969	0.0%
1950–1959	4.0%
1940–1949	4.0%
1939 or earlier	0.0%

Bedrooms

Size	% of units
No bedroom (studio)	5.2%
1 bedroom	5.6%
2 bedrooms	22.8%
3 bedrooms	49.4%
4 bedrooms	17.0%
5+ bedrooms	0.0%

Vehicles per household

Vehicles	% of households
No vehicle	1.3%
1 vehicle	1.9%
2 vehicles	42.4%
3 or more	54.3%

Heating fuel

Fuel type	%
Utility gas	7.7%
Electricity	34.7%
Propane / LP gas	57.6%

Households & families

Household type	Count	%
Married-couple family	232	74.6%
Cohabiting couple	13	4.2%
Male householder, no spouse	6	1.9%
Female householder, no spouse	60	19.3%
Households with children under 18	176	56.6%
Households with seniors (65+)	85	27.3%
Average household size	2.71

Marital status

Status	Male	Female
Never married	15.6%	21.8%
Married	77.7%	72.6%
Separated	0.0%	0.0%
Widowed	2.1%	5.5%
Divorced	4.6%	0.0%

Education

Less than 9th grade 0.0%

Some HS, no diploma 14.8%

HS graduate 14.3%

Some college, no degree 8.3%

Associate's degree 11.8%

Bachelor's degree 42.8%

Graduate / professional 8.1%

Metric	%
HS diploma or higher	85.2%
Bachelor's or higher	50.8%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	25	8.6%
Elementary school	124	42.5%
High school	49	16.8%
College / grad school	94	32.2%

Employment

Industry of employment

Transportation & utilities 43.0%

Manufacturing 26.6%

Education & healthcare 11.0%

Public administration 9.3%

Other services 4.6%

Retail trade 3.4%

Arts, food & hospitality 2.1%

Occupation

Category	%
Management, business & arts	32.1%
Service	2.1%
Sales & office	3.4%
Natural resources & construction	30.0%
Production & transportation	32.5%

Employment type

Type	%
Private sector	75.9%
Government	19.4%
Self-employed	4.6%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	100.0%
Carpool	0.0%
Public transit	0.0%
Walk	0.0%
Work from home	0.0%
Other means	0.0%
Avg commute (minutes)	35.4

Poverty

All people 14.7%

Under 18 years 16.5%

18 and over 13.8%

Married-couple families 7.3%

Female-led households 100.0%

Income support

Source	% of households
Social Security	37.0%
Retirement income	11.3%
Supplemental Security	5.5%
Cash public assistance	0.0%
Food stamps / SNAP	19.0%

Health indicators

Condition	%
Obesity	34.2%
High blood pressure	32.2%
High cholesterol	32.9%
Diabetes	9.0%
Heart disease	6.1%
Stroke	2.8%
Asthma	9.3%
Arthritis	25.7%
Kidney disease	2.6%
Pulmonary disease	6.6%
Cancer	6.8%

Behavior / access	%
Smoking	18.2%
Binge drinking	16.1%
No physical activity	23.1%
Less than 7 hrs sleep	32.9%
Depression	17.3%
Fair or poor health	12.6%
Poor mental health	12.4%
Poor physical health	9.3%
No health insurance	9.5%
Visited doctor (checkup)	75.8%
Visited dentist	66.0%
Cholesterol screening	90.7%
Teeth loss	12.8%

Veterans & disability

Veterans	Count	%
Civilian veterans	55	10.1%

Disability	%
Any disability	11.6%
Under 18	0.0%
18–64 years	19.0%
65 and over	13.4%

Health insurance coverage

Type	%
Private insurance	84.3%
Public insurance	32.2%
No insurance	0.5%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	815	96.7%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	843	100.0%
Born in same state	843	100.0%
Born in different state	378	44.8%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Italian	100	11.9%
English	55	6.5%
French	36	4.3%

Ancestry	Count	%
Arab	18	2.1%
German	13	1.5%

Technology access

Metric	% of households
Computer access	36.9%
Internet access	83.9%

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

Frequently asked questions about ZIP code 62423

What city is ZIP code 62423 in?

ZIP code 62423 is primarily assigned to Dennison, Illinois.

What county is ZIP code 62423 in?

ZIP code 62423 falls within Clark County, Illinois.

Is ZIP code 62423 family-oriented?

34% of residents in ZIP code 62423 are under 18, reflecting a younger, family-oriented community.

Is ZIP code 62423 mostly owner-occupied?

94% of occupied units in ZIP code 62423 are owner-occupied, well above the national average.

How educated is the population of ZIP code 62423?

51% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

Does ZIP code 62423 have a large retiree population?

37% of households in ZIP code 62423 receive Social Security income, suggesting a significant retiree or disability population.

What timezone is ZIP code 62423 in?

ZIP code 62423 observes the CST timezone.