Clark County, IL ZIP Codes
Illinois (IL) · 6 ZIP codes · 6 cities
6
ZIP codes
15,300
population (2021)
-6.3%
pop change since 2010
17023
FIPS code
Clark County ZIP code map
About Clark County
Clark County is located in Illinois and contains 6 ZIP codes across 6 cities and communities.
The county's population was 15,300 as of 2021,
a decrease of
6.3% from 16,335 in 2010.
The timezone is Mountain Time (observes DST).
The Federal Information Processing System (FIPS) code for Clark County is 17023.
| Population | |
|---|---|
| 2021 population | 15,300 |
| 2010 population | 16,335 |
| Change | -6.3% |
| County details | |
|---|---|
| State | Illinois |
| FIPS code | 17023 |
| Timezone | Mountain |
| Daylight saving | Yes |
Cities in Clark County
ZIP codes for Clark County, IL (6)
| ZIP code | City | County | Map |
|---|---|---|---|
| 62420 | Casey | Clark | View map |
| 62423 | Dennison | Clark | View map |
| 62441 | Marshall | Clark | View map |
| 62442 | Martinsville | Clark | View map |
| 62474 | Westfield | Clark | View map |
| 62477 | West Union | Clark | View map |
Demographics & statistics
16,145
Population
42.2
Median age
$67,033
Median household income
$32,997
Per capita income
$111,171
Median home value
$602
Median monthly rent
84.9%
Home ownership
12.9%
Poverty rate
3.5%
Unemployment
6,434
Housing units
25.1%
Bachelor's or higher
Age distribution
Male
Female
449
Under 5
452
537
5–9
541
480
10–14
484
526
15–19
530
432
20–24
435
877
25–34
883
966
35–44
973
947
45–54
954
572
55–59
577
643
60–64
647
933
65–74
940
462
75–84
465
219
85+
221
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 3,661 | 22.0% |
| 18 and over | 12,484 | 78.0% |
| 65 and over | 3,240 | 21.0% |
| Median age | 42.2 years | |
Race & ethnicity
White
94.8%
Two or more races
2.6%
Hispanic or Latino
1.5%
Black or African American
0.8%
Asian
0.2%
Other race
0.1%
| Group | Count | % |
|---|---|---|
| White | 15,543 | 94.8% |
| Two or more races | 429 | 2.6% |
| Hispanic or Latino | 243 | 1.5% |
| Black or African American | 129 | 0.8% |
| Asian | 28 | 0.2% |
| Other race | 9 | 0.1% |
Household income
Under $10k
4.3%
$10k–$15k
5.7%
$15k–$25k
10.2%
$25k–$35k
6.1%
$35k–$50k
13.1%
$50k–$75k
17.2%
$75k–$100k
16.2%
$100k–$150k
17.0%
$150k–$200k
5.7%
$200k+
4.5%
| Range | % of households |
|---|---|
| Under $10k | 4.3% |
| $10k–$15k | 5.7% |
| $15k–$25k | 10.2% |
| $25k–$35k | 6.1% |
| $35k–$50k | 13.1% |
| $50k–$75k | 17.2% |
| $75k–$100k | 16.2% |
| $100k–$150k | 17.0% |
| $150k–$200k | 5.7% |
| $200k+ | 4.5% |
| Median income | $67,033 |
Housing
Home values
Under $50k
16.7%
$50k–$100k
28.4%
$100k–$150k
19.2%
$150k–$200k
15.0%
$200k–$300k
12.3%
$300k–$500k
7.3%
$500k–$1M
0.8%
$1M+
0.2%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $111,171 |
| Median rent / month | $602 |
| Owner occupied | 84.9% |
| Renter occupied | 15.1% |
| Vacant | 12.0% |
| Single-family detached | 80.2% |
| Large apartment buildings | 0.3% |
| Mobile homes | 12.1% |
| Median rooms | 5.9 |
| Avg household size (owned) | 2.52 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.0% |
| 2010–2019 | 6.7% |
| 2000–2009 | 11.5% |
| 1990–1999 | 9.8% |
| 1980–1989 | 11.2% |
| 1970–1979 | 14.0% |
| 1960–1969 | 8.6% |
| 1950–1959 | 7.2% |
| 1940–1949 | 5.5% |
| 1939 or earlier | 25.2% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 1.3% |
| 1 bedroom | 5.8% |
| 2 bedrooms | 25.8% |
| 3 bedrooms | 49.5% |
| 4 bedrooms | 13.5% |
| 5+ bedrooms | 4.1% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 3.8% |
| 1 vehicle | 20.2% |
| 2 vehicles | 39.9% |
| 3 or more | 36.1% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 31.7% |
| Electricity | 22.3% |
| Propane / LP gas | 36.0% |
| Fuel oil | 0.1% |
| Wood | 9.4% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 3,548 | 57.2% |
| Cohabiting couple | 544 | 8.0% |
| Male householder, no spouse | 1,028 | 15.0% |
| Female householder, no spouse | 1,623 | 19.8% |
| Households with children under 18 | 2,208 | 34.1% |
| Households with seniors (65+) | 2,216 | 35.4% |
| Average household size | 2.43 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 25.9% | 21.9% |
| Married | 59.1% | 56.5% |
| Separated | 0.3% | 1.5% |
| Widowed | 4.1% | 10.7% |
| Divorced | 10.6% | 9.5% |
Education
Less than 9th grade
2.5%
Some HS, no diploma
6.9%
HS graduate
33.0%
Some college, no degree
17.8%
Associate's degree
14.8%
Bachelor's degree
18.4%
Graduate / professional
6.7%
| Metric | % |
|---|---|
| HS diploma or higher | 90.7% |
| Bachelor's or higher | 25.1% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 223 | 5.2% |
| Kindergarten | 237 | 5.3% |
| Elementary school | 1,464 | 44.6% |
| High school | 862 | 23.1% |
| College / grad school | 624 | 21.8% |
Employment
Industry of employment
Manufacturing
22.4%
Education & healthcare
20.7%
Retail trade
10.1%
Transportation & utilities
9.5%
Arts, food & hospitality
6.1%
Construction
6.0%
Agriculture & mining
5.5%
Professional & management
5.2%
Public administration
4.4%
Other services
3.9%
Finance & real estate
2.8%
Information
1.9%
Wholesale trade
1.5%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 33.5% |
| Service | 15.2% |
| Sales & office | 14.6% |
| Natural resources & construction | 15.0% |
| Production & transportation | 21.6% |
Employment type
| Type | % |
|---|---|
| Private sector | 77.7% |
| Government | 15.1% |
| Self-employed | 6.9% |
| Unpaid family workers | 0.4% |
Commute
| Method | % |
|---|---|
| Drive alone | 87.1% |
| Carpool | 8.5% |
| Public transit | 0.2% |
| Walk | 1.2% |
| Other means | 0.3% |
| Avg commute (minutes) | 28.5 |
Poverty
All people
12.9%
Under 18 years
11.6%
18 and over
13.0%
Married-couple families
3.1%
Female-led households
26.2%
Income support
| Source | % of households |
|---|---|
| Social Security | 40.3% |
| Retirement income | 24.3% |
| Supplemental Security | 4.3% |
| Cash public assistance | 1.1% |
| Food stamps / SNAP | 13.0% |
Health indicators
| Condition | % |
|---|---|
| High blood pressure | 34.4% |
| High cholesterol | 33.8% |
| Heart disease | 7.0% |
| Stroke | 3.2% |
| Asthma | 9.7% |
| Arthritis | 28.0% |
| Kidney disease | 3.0% |
| Pulmonary disease | 7.8% |
| Cancer | 7.3% |
| Behavior / access | % |
|---|---|
| Binge drinking | 15.3% |
| No physical activity | 25.2% |
| Less than 7 hrs sleep | 32.9% |
| Fair or poor health | 14.5% |
| Poor mental health | 12.9% |
| Poor physical health | 10.4% |
| No health insurance | 10.3% |
| Visited doctor (checkup) | 76.7% |
| Visited dentist | 63.4% |
| Cholesterol screening | 89.9% |
| Teeth loss | 14.7% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 950 | 8.6% |
| Disability | % |
|---|---|
| Any disability | 14.6% |
| Under 18 | 2.9% |
| 18–64 years | 12.9% |
| 65 and over | 31.7% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 72.3% |
| Public insurance | 39.8% |
| Uninsured under 19 | 2.1% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 15,244 | 95.5% |
| Spanish | 88 | 0.5% |
| Other Indo-European | 78 | 0.5% |
| Asian & Pacific Islander | 10 | 0.1% |
| Other languages | 0 | 0.0% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 16,057 | 99.1% |
| Born in same state | 16,025 | 98.8% |
| Born in different state | 7,305 | 49.9% |
| Foreign born | 32 | 0.3% |
| Naturalized citizen | 88 | 0.9% |
| Not a US citizen | 46 | 48.9% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| French | 2,488 | 15.4% |
| Italian | 1,971 | 12.2% |
| Arab | 1,516 | 9.4% |
| English | 270 | 1.7% |
| Ancestry | Count | % |
|---|---|---|
| Polish | 53 | 0.3% |
| German | 30 | 0.2% |
| Irish | 25 | 0.2% |
| Norwegian | 9 | 0.1% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 40.7% |
| Internet access | 90.4% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
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