Mercer County, IL ZIP Codes
Illinois (IL) · 12 ZIP codes · 12 cities
12
ZIP codes
15,582
population (2021)
-5.2%
pop change since 2010
17131
FIPS code
Mercer County ZIP code map
About Mercer County
Mercer County is located in Illinois and contains 12 ZIP codes across 12 cities and communities.
The county's population was 15,582 as of 2021,
a decrease of
5.2% from 16,434 in 2010.
The timezone is Mountain Time (observes DST).
The Federal Information Processing System (FIPS) code for Mercer County is 17131.
| Population | |
|---|---|
| 2021 population | 15,582 |
| 2010 population | 16,434 |
| Change | -5.2% |
| County details | |
|---|---|
| State | Illinois |
| FIPS code | 17131 |
| Timezone | Mountain |
| Daylight saving | Yes |
Cities in Mercer County
Aledo
Alexis
Joy
Keithsburg
Matherville
New Boston
New Windsor
North Henderson
Preemption
Seaton
Sherrard
Viola
ZIP codes for Mercer County, IL (12)
| ZIP code | City | County | Map |
|---|---|---|---|
| 61231 | Aledo | Mercer | View map |
| 61260 | Joy | Mercer | View map |
| 61263 | Matherville | Mercer | View map |
| 61272 | New Boston | Mercer | View map |
| 61276 | Preemption | Mercer | View map |
| 61281 | Sherrard | Mercer | View map |
| 61412 | Alexis | Mercer | View map |
| 61442 | Keithsburg | Mercer | View map |
| 61465 | New Windsor | Mercer | View map |
| 61466 | North Henderson | Mercer | View map |
| 61476 | Seaton | Mercer | View map |
| 61486 | Viola | Mercer | View map |
Demographics & statistics
15,067
Population
45.5
Median age
$64,904
Median household income
$35,112
Per capita income
$115,860
Median home value
$687
Median monthly rent
86.4%
Home ownership
6.9%
Poverty rate
4.1%
Unemployment
5,895
Housing units
18.2%
Bachelor's or higher
Age distribution
Male
Female
374
Under 5
325
413
5–9
358
561
10–14
487
481
15–19
417
417
20–24
361
835
25–34
725
947
35–44
822
1,015
45–54
881
710
55–59
617
589
60–64
511
980
65–74
850
550
75–84
477
195
85+
169
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 3,108 | 20.6% |
| 18 and over | 11,959 | 79.5% |
| 65 and over | 3,221 | 21.2% |
| Median age | 45.5 years | |
Race & ethnicity
White
93.4%
Two or more races
2.9%
Hispanic or Latino
2%
Other race
0.6%
Black or African American
0.6%
Asian
0.5%
| Group | Count | % |
|---|---|---|
| White | 14,372 | 93.4% |
| Two or more races | 446 | 2.9% |
| Hispanic or Latino | 313 | 2% |
| Other race | 88 | 0.6% |
| Black or African American | 87 | 0.6% |
| Asian | 74 | 0.5% |
Household income
Under $10k
3.2%
$10k–$15k
2.8%
$15k–$25k
10.4%
$25k–$35k
7.2%
$35k–$50k
13.0%
$50k–$75k
18.2%
$75k–$100k
14.8%
$100k–$150k
15.5%
$150k–$200k
11.0%
$200k+
4.1%
| Range | % of households |
|---|---|
| Under $10k | 3.2% |
| $10k–$15k | 2.8% |
| $15k–$25k | 10.4% |
| $25k–$35k | 7.2% |
| $35k–$50k | 13.0% |
| $50k–$75k | 18.2% |
| $75k–$100k | 14.8% |
| $100k–$150k | 15.5% |
| $150k–$200k | 11.0% |
| $200k+ | 4.1% |
| Median income | $64,904 |
Housing
Home values
Under $50k
14.1%
$50k–$100k
31.1%
$100k–$150k
20.1%
$150k–$200k
15.6%
$200k–$300k
12.4%
$300k–$500k
4.8%
$500k–$1M
1.8%
$1M+
0.3%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $115,860 |
| Median rent / month | $687 |
| Owner occupied | 86.4% |
| Renter occupied | 13.6% |
| Vacant | 12.1% |
| Single-family detached | 89.1% |
| Large apartment buildings | 0.7% |
| Mobile homes | 5.1% |
| Median rooms | 6.5 |
| Avg household size (owned) | 2.40 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.1% |
| 2010–2019 | 2.6% |
| 2000–2009 | 5.3% |
| 1990–1999 | 8.2% |
| 1980–1989 | 4.0% |
| 1970–1979 | 17.3% |
| 1960–1969 | 7.2% |
| 1950–1959 | 7.7% |
| 1940–1949 | 5.3% |
| 1939 or earlier | 42.4% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 2.1% |
| 1 bedroom | 3.9% |
| 2 bedrooms | 25.7% |
| 3 bedrooms | 44.5% |
| 4 bedrooms | 17.6% |
| 5+ bedrooms | 6.3% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 4.4% |
| 1 vehicle | 22.3% |
| 2 vehicles | 41.2% |
| 3 or more | 32.0% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 61.2% |
| Electricity | 10.1% |
| Propane / LP gas | 23.5% |
| Fuel oil | 1.0% |
| Wood | 2.2% |
| No fuel used | 0.2% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 3,620 | 56.5% |
| Cohabiting couple | 342 | 5.2% |
| Male householder, no spouse | 999 | 18.9% |
| Female householder, no spouse | 1,341 | 19.4% |
| Households with children under 18 | 1,805 | 29.0% |
| Households with seniors (65+) | 2,183 | 34.8% |
| Average household size | 2.37 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 29.1% | 16.7% |
| Married | 57.8% | 62.1% |
| Separated | 1.7% | 0.9% |
| Widowed | 4.6% | 10.7% |
| Divorced | 6.8% | 9.7% |
Education
Less than 9th grade
1.8%
Some HS, no diploma
6.6%
HS graduate
39.3%
Some college, no degree
24.7%
Associate's degree
9.4%
Bachelor's degree
10.4%
Graduate / professional
7.8%
| Metric | % |
|---|---|
| HS diploma or higher | 91.6% |
| Bachelor's or higher | 18.2% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 227 | 8.5% |
| Kindergarten | 180 | 6.3% |
| Elementary school | 1,409 | 49.0% |
| High school | 828 | 24.7% |
| College / grad school | 379 | 11.5% |
Employment
Industry of employment
Education & healthcare
18.3%
Manufacturing
15.9%
Retail trade
11.1%
Agriculture & mining
10.6%
Transportation & utilities
10.0%
Construction
9.8%
Finance & real estate
5.0%
Other services
4.9%
Public administration
4.2%
Professional & management
4.1%
Arts, food & hospitality
3.5%
Wholesale trade
1.7%
Information
0.7%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 27.9% |
| Service | 12.6% |
| Sales & office | 22.9% |
| Natural resources & construction | 17.8% |
| Production & transportation | 18.8% |
Employment type
| Type | % |
|---|---|
| Private sector | 79.2% |
| Government | 13.1% |
| Self-employed | 7.7% |
| Unpaid family workers | 0.1% |
Commute
| Method | % |
|---|---|
| Drive alone | 78.6% |
| Carpool | 7.4% |
| Public transit | 0.1% |
| Walk | 2.2% |
| Other means | 1.0% |
| Avg commute (minutes) | 30.2 |
Poverty
All people
6.9%
Under 18 years
10.7%
18 and over
6.3%
Married-couple families
2.4%
Female-led households
21.0%
Income support
| Source | % of households |
|---|---|
| Social Security | 36.5% |
| Retirement income | 30.7% |
| Supplemental Security | 5.3% |
| Cash public assistance | 1.4% |
| Food stamps / SNAP | 10.1% |
Health indicators
| Condition | % |
|---|---|
| High blood pressure | 35.2% |
| High cholesterol | 34.7% |
| Heart disease | 7.4% |
| Stroke | 3.4% |
| Asthma | 9.7% |
| Arthritis | 28.9% |
| Kidney disease | 3.1% |
| Pulmonary disease | 8.0% |
| Cancer | 7.6% |
| Behavior / access | % |
|---|---|
| Binge drinking | 15.0% |
| No physical activity | 26.1% |
| Less than 7 hrs sleep | 32.1% |
| Fair or poor health | 14.9% |
| Poor mental health | 12.8% |
| Poor physical health | 10.6% |
| No health insurance | 10.5% |
| Visited doctor (checkup) | 76.7% |
| Visited dentist | 61.0% |
| Cholesterol screening | 90.3% |
| Teeth loss | 14.6% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 1,040 | 8.2% |
| Disability | % |
|---|---|
| Any disability | 14.5% |
| Under 18 | 2.4% |
| 18–64 years | 10.9% |
| 65 and over | 36.4% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 74.8% |
| Public insurance | 35.5% |
| Uninsured under 19 | 4.7% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 14,368 | 95.1% |
| Spanish | 125 | 0.5% |
| Other Indo-European | 73 | 0.3% |
| Asian & Pacific Islander | 17 | 0.0% |
| Other languages | 13 | 0.2% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 14,889 | 99.0% |
| Born in same state | 14,857 | 98.9% |
| Born in different state | 10,497 | 70.9% |
| Foreign born | 32 | 0.1% |
| Naturalized citizen | 178 | 1.0% |
| Not a US citizen | 144 | 64.2% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Italian | 1,618 | 10.7% |
| French | 1,455 | 9.7% |
| Arab | 869 | 5.8% |
| English | 235 | 1.6% |
| Polish | 109 | 0.7% |
| Ancestry | Count | % |
|---|---|---|
| Dutch | 58 | 0.4% |
| German | 42 | 0.3% |
| Norwegian | 8 | 0.1% |
| Irish | 7 | 0% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 42.3% |
| Internet access | 89.6% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
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