Williamson County, IL ZIP Codes
Illinois (IL) · 11 ZIP codes · 11 cities
11
ZIP codes
66,879
population (2021)
+0.8%
pop change since 2010
17199
FIPS code
Williamson County ZIP code map
About Williamson County
Williamson County is located in Illinois and contains 11 ZIP codes across 11 cities and communities.
The county's population was 66,879 as of 2021,
an increase of
0.8% from 66,357 in 2010.
The timezone is Mountain Time (observes DST).
The Federal Information Processing System (FIPS) code for Williamson County is 17199.
| Population | |
|---|---|
| 2021 population | 66,879 |
| 2010 population | 66,357 |
| Change | +0.8% |
| County details | |
|---|---|
| State | Illinois |
| FIPS code | 17199 |
| Timezone | Mountain |
| Daylight saving | Yes |
Cities in Williamson County
Cambria
Carterville
Colp
Creal Springs
Energy
Freeman Spur
Herrin
Hurst
Johnston City
Marion
Pittsburg
ZIP codes for Williamson County, IL (11)
| ZIP code | City | County | Map |
|---|---|---|---|
| 62841 | Freeman Spur | Williamson | View map |
| 62915 | Cambria | Williamson | View map |
| 62918 | Carterville | Williamson | View map |
| 62921 | Colp | Williamson | View map |
| 62922 | Creal Springs | Williamson | View map |
| 62933 | Energy | Williamson | View map |
| 62948 | Herrin | Williamson | View map |
| 62949 | Hurst | Williamson | View map |
| 62951 | Johnston City | Williamson | View map |
| 62959 | Marion | Williamson | View map |
| 62974 | Pittsburg | Williamson | View map |
Demographics & statistics
61,952
Population
41.5
Median age
$61,222
Median household income
$35,498
Per capita income
$139,671
Median home value
$803
Median monthly rent
77.2%
Home ownership
10.9%
Poverty rate
4.8%
Unemployment
21,939
Housing units
25.6%
Bachelor's or higher
Age distribution
Male
Female
1,743
Under 5
1,779
1,733
5–9
1,770
1,920
10–14
1,960
1,660
15–19
1,694
1,643
20–24
1,677
3,887
25–34
3,968
4,093
35–44
4,178
3,866
45–54
3,947
1,851
55–59
1,890
2,299
60–64
2,347
3,428
65–74
3,500
1,849
75–84
1,887
684
85+
699
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 13,207 | 21.4% |
| 18 and over | 48,745 | 78.6% |
| 65 and over | 12,047 | 20.0% |
| Median age | 41.5 years | |
Race & ethnicity
White
87.4%
Two or more races
4.3%
Black or African American
3.3%
Hispanic or Latino
2.2%
Asian
1.5%
Other race
0.7%
American Indian / Alaska Native
0.5%
| Group | Count | % |
|---|---|---|
| White | 55,408 | 87.4% |
| Two or more races | 2,735 | 4.3% |
| Black or African American | 2,062 | 3.3% |
| Hispanic or Latino | 1,411 | 2.2% |
| Asian | 981 | 1.5% |
| Other race | 449 | 0.7% |
| American Indian / Alaska Native | 317 | 0.5% |
Household income
Under $10k
4.5%
$10k–$15k
3.5%
$15k–$25k
5.9%
$25k–$35k
10.1%
$35k–$50k
13.2%
$50k–$75k
21.1%
$75k–$100k
12.4%
$100k–$150k
17.4%
$150k–$200k
7.3%
$200k+
4.6%
| Range | % of households |
|---|---|
| Under $10k | 4.5% |
| $10k–$15k | 3.5% |
| $15k–$25k | 5.9% |
| $25k–$35k | 10.1% |
| $35k–$50k | 13.2% |
| $50k–$75k | 21.1% |
| $75k–$100k | 12.4% |
| $100k–$150k | 17.4% |
| $150k–$200k | 7.3% |
| $200k+ | 4.6% |
| Median income | $61,222 |
Housing
Home values
Under $50k
10.0%
$50k–$100k
22.4%
$100k–$150k
23.3%
$150k–$200k
16.8%
$200k–$300k
15.4%
$300k–$500k
10.0%
$500k–$1M
1.5%
$1M+
0.6%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $139,671 |
| Median rent / month | $803 |
| Owner occupied | 77.2% |
| Renter occupied | 22.8% |
| Vacant | 12.4% |
| Single-family detached | 76.2% |
| Large apartment buildings | 1.3% |
| Mobile homes | 9.7% |
| Median rooms | 5.7 |
| Avg household size (owned) | 2.39 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.3% |
| 2010–2019 | 8.6% |
| 2000–2009 | 13.0% |
| 1990–1999 | 14.1% |
| 1980–1989 | 12.3% |
| 1970–1979 | 14.8% |
| 1960–1969 | 10.6% |
| 1950–1959 | 6.5% |
| 1940–1949 | 4.9% |
| 1939 or earlier | 14.9% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 1.5% |
| 1 bedroom | 4.6% |
| 2 bedrooms | 26.7% |
| 3 bedrooms | 50.7% |
| 4 bedrooms | 12.9% |
| 5+ bedrooms | 3.6% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 5.7% |
| 1 vehicle | 29.5% |
| 2 vehicles | 42.6% |
| 3 or more | 22.1% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 25.5% |
| Electricity | 67.0% |
| Propane / LP gas | 5.7% |
| Wood | 1.3% |
| No fuel used | 0.2% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 12,234 | 48.4% |
| Cohabiting couple | 1,912 | 7.1% |
| Male householder, no spouse | 5,131 | 18.6% |
| Female householder, no spouse | 7,098 | 25.9% |
| Households with children under 18 | 7,136 | 27.5% |
| Households with seniors (65+) | 8,727 | 34.2% |
| Average household size | 2.31 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 26.8% | 23.2% |
| Married | 52.7% | 51.4% |
| Separated | 1.6% | 1.9% |
| Widowed | 4.6% | 10.3% |
| Divorced | 14.3% | 13.2% |
Education
Less than 9th grade
2.1%
Some HS, no diploma
4.7%
HS graduate
30.4%
Some college, no degree
25.0%
Associate's degree
12.3%
Bachelor's degree
16.0%
Graduate / professional
9.6%
| Metric | % |
|---|---|
| HS diploma or higher | 93.2% |
| Bachelor's or higher | 25.6% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 917 | 7.0% |
| Kindergarten | 771 | 5.1% |
| Elementary school | 6,005 | 46.8% |
| High school | 2,875 | 22.8% |
| College / grad school | 2,843 | 18.3% |
Employment
Industry of employment
Education & healthcare
30.7%
Retail trade
10.6%
Finance & real estate
8.9%
Manufacturing
7.5%
Arts, food & hospitality
7.3%
Public administration
6.5%
Professional & management
5.8%
Transportation & utilities
5.6%
Construction
5.4%
Other services
4.3%
Agriculture & mining
3.5%
Wholesale trade
2.7%
Information
1.1%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 38.0% |
| Service | 18.5% |
| Sales & office | 20.8% |
| Natural resources & construction | 12.1% |
| Production & transportation | 10.7% |
Employment type
| Type | % |
|---|---|
| Private sector | 73.8% |
| Government | 21.1% |
| Self-employed | 5.0% |
| Unpaid family workers | 0.1% |
Commute
| Method | % |
|---|---|
| Drive alone | 84.7% |
| Carpool | 6.8% |
| Public transit | 0.4% |
| Walk | 1.0% |
| Other means | 0.9% |
| Avg commute (minutes) | 23.9 |
Poverty
All people
10.9%
Under 18 years
14.4%
18 and over
10.0%
Married-couple families
4.0%
Female-led households
19.7%
Income support
| Source | % of households |
|---|---|
| Social Security | 36.6% |
| Retirement income | 31.2% |
| Supplemental Security | 2.9% |
| Cash public assistance | 3.4% |
| Food stamps / SNAP | 12.6% |
Health indicators
| Condition | % |
|---|---|
| High blood pressure | 34.8% |
| High cholesterol | 33.7% |
| Heart disease | 6.9% |
| Stroke | 3.2% |
| Asthma | 9.8% |
| Arthritis | 27.7% |
| Kidney disease | 3.0% |
| Pulmonary disease | 7.5% |
| Cancer | 7.3% |
| Behavior / access | % |
|---|---|
| Binge drinking | 14.9% |
| No physical activity | 24.3% |
| Less than 7 hrs sleep | 31.1% |
| Fair or poor health | 14.3% |
| Poor mental health | 12.8% |
| Poor physical health | 10.1% |
| No health insurance | 10.2% |
| Visited doctor (checkup) | 77.3% |
| Visited dentist | 65.1% |
| Cholesterol screening | 89.9% |
| Teeth loss | 14.1% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 4,634 | 9.5% |
| Disability | % |
|---|---|
| Any disability | 17.6% |
| Under 18 | 5.9% |
| 18–64 years | 14.2% |
| 65 and over | 39.4% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 70.4% |
| Public insurance | 43.0% |
| Uninsured under 19 | 3.0% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 58,430 | 94.7% |
| Spanish | 523 | 0.8% |
| Other Indo-European | 311 | 0.5% |
| Asian & Pacific Islander | 44 | 0.1% |
| Other languages | 168 | 0.3% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 60,579 | 98.3% |
| Born in same state | 60,370 | 98.0% |
| Born in different state | 47,012 | 77.1% |
| Foreign born | 209 | 0.3% |
| Naturalized citizen | 1,373 | 1.7% |
| Not a US citizen | 641 | 39.9% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Italian | 8,185 | 13.2% |
| French | 7,983 | 12.9% |
| Arab | 4,116 | 6.6% |
| Polish | 794 | 1.3% |
| English | 621 | 1% |
| Ancestry | Count | % |
|---|---|---|
| Dutch | 187 | 0.3% |
| Norwegian | 123 | 0.2% |
| Irish | 113 | 0.2% |
| German | 49 | 0.1% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 42.5% |
| Internet access | 89.3% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
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