Postal Codes

62351 ZIP Code

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ZIP code 62351 covers Mendon, Illinois, with a population of about 2,026 and a median household income of $73,772.

Population
2,02628 per square mile
Median age
36.91.8 points below the US average
Median household income
$73,77210% below the Illinois median
Poverty rate
7.9%4.5 points below the US average
Typical home value
$217,895up 22.1% in five years
Degree or higher
21.6%13.4 points below the US average
Homeownership
88.1%23.1 points above the US average
Time zone
Central UTC-06:00observes daylight saving time
Businesses
32

Where 62351 is

Mendon, Illinois — the area the Census Bureau draws for this ZIP code. ZIP codes are sets of delivery routes rather than areas, so this is the Census approximation of one, not a Postal Service boundary.

People and households

American Community Survey 2019–2023 five-year estimates

Population2,026
Median age36.9
Family households68.1%
Born outside the US0%
Speaks a language other than English at home0%
White (non-Hispanic)98.9%
Black (non-Hispanic)0%
Asian (non-Hispanic)0%
Hispanic or Latino0.6%
Veterans7.8%
Population by age
MaleFemale0-45-910-1415-1920-2425-3435-4445-5455-6465-7475-8485+
Income and poverty

American Community Survey 2019–2023 five-year estimates

Median household income$73,772
Income per person$34,600
Poverty rate7.9%
Households on SNAP or cash assistance10.2%

Household income distribution

Under $10k2.9%
$10–15k5.6%
$15–20k1.7%
$20–25k2.1%
$25–30k2.7%
$30–35k1.6%
$35–40k3.0%
$40–45k5.1%
$45–50k0.3%
$50–60k6.8%
$60–75k22.0%
$75–100k11.6%
$100–125k13.7%
$125–150k10.7%
$150–200k5.7%
$200k or more4.6%

Income as declared to the IRS

Filed returns rather than survey responses, so this counts tax units and not households.

Tax returns filed880
Mean adjusted gross income$69,485
Returns declaring $200,000 or more4.5%
Returns, under $25k25.0%
Returns, $25k–$50k25.0%
Returns, $50k–$75k15.9%
Returns, $75k–$100k12.5%
Returns, $100k–$200k17.0%
Returns, $200k or more4.5%
Housing

American Community Survey 2019–2023 five-year estimates

Median home value$150,700
Rent as a share of household income28.6%
Owner-occupied88.1%
Vacant homes8.1%
Median year built1971

What the homes are

Detached house85.4%
Attached house0.6%
2 to 4 units6.8%
Mobile home7.2%
Home values and rents today

Zillow Home Value Index and Zillow Observed Rent Index, courtesy of Zillow. Monthly and current, where the Census figures above are a five-year average and are capped at $2,000,000.

Typical home value$217,895as of 2026-07
Typical home value, 1 yearup 12.2%
Typical home value, 5 yearsup 22.1%
Typical home value, 10 yearsup 43.7%
Typical home value since 2000
200920172026$217,895$125,612

$137,946 in 2009 to $217,895 in 2026.

Work, commuting and education

American Community Survey 2019–2023 five-year estimates

Unemployment rate3.6%
Bachelor's degree or higher21.6%
High school diploma or higher95.4%
Works from home3.3%
Drives to work alone90.1%
Takes public transport0%
Commutes 45 minutes or more7.1%
Health

CDC PLACES 2025 release, model-based estimates. These are modelled small-area estimates for adults, not counts of diagnosed cases.

Obesity37.7% 4.3 pts above the national average of 33.4%
Diagnosed diabetes11.4% 0.6 pts below the national average of 12%
Currently smokes14.8% 1.6 pts above the national average of 13.2%
High blood pressure36.2% 2.1 pts above the national average of 34.1%
Fair or poor general health18.1% 2.2 pts below the national average of 20.3%
No health insurance (18–64)6.8% 4.5 pts below the national average of 11.3%
Depression23% 1.1 pts above the national average of 21.9%
No leisure-time physical activity23.3% 2.1 pts below the national average of 25.4%
Arthritis28.5% 3.4 pts above the national average of 25.1%
Binge drinking19% 3 pts above the national average of 16%
Taking blood pressure medication76.9% 2.2 pts above the national average of 74.7%
Cancer (non-skin)9.5% 1.8 pts above the national average of 7.7%
Current asthma10.4% same as the national average of 10.4%
Coronary heart disease7% 0.8 pts above the national average of 6.2%
Routine check-up in past year78.1% 1.4 pts above the national average of 76.7%
Cholesterol screening87% 1.1 pts above the national average of 85.9%
Cognitive disability13.6% 1.2 pts below the national average of 14.8%
Colorectal screening62.6% 1.7 pts below the national average of 64.3%
COPD7.8% 1.2 pts above the national average of 6.6%
Visited a dentist63.5% 2.2 pts above the national average of 61.3%
Any disability30.1% 0.6 pts below the national average of 30.7%
Lacks emotional support23.1% 1.7 pts below the national average of 24.8%
Food insecurity11.9% 5.2 pts below the national average of 17.1%
Received food stamps11.5% 2.8 pts below the national average of 14.3%
Hearing disability7.6% 0.9 pts above the national average of 6.7%
High cholesterol37.6% 1.4 pts above the national average of 36.2%
Housing insecurity9.7% 4.1 pts below the national average of 13.8%
Independent living disability8.2% same as the national average of 8.4%
Lacks transport6.6% 2.6 pts below the national average of 9.2%
Loneliness32.5% 1.9 pts below the national average of 34.4%
Mammography use69.9% 6 pts below the national average of 75.9%
Poor mental health (14+ days)17.2% same as the national average of 16.8%
Mobility disability13.9% same as the national average of 14%
Poor physical health (14+ days)13.5% same as the national average of 13.5%
Self-care disability3.6% same as the national average of 4%
Utility shut-off threat6.4% 2.4 pts below the national average of 8.8%
Sleeps under 7 hours36.1% same as the national average of 36.4%
Stroke3.6% same as the national average of 3.4%
All natural teeth lost12.1% 0.9 pts below the national average of 13%
Vision disability4.4% 1.2 pts below the national average of 5.6%
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Business and employment

Census ZIP Code Business Patterns 2022

Business establishments32
People employed169
Annual payroll$8,934,000
Natural hazard risk

FEMA National Risk Index, estimated for this ZIP code from census tract data — the NRI is not published per ZIP.

Overall riskHigher than 70.9% of US census tracts
FEMA ratingRelatively Low to Relatively Moderate across the 2 census tracts this ZIP code covers
Expected annual loss67.7 out of 100
Community resilience85.4 out of 100

By hazard

Score is out of 100 and is the area-weighted average across the census tracts this ZIP code covers. The rating beside it is the highest any one of those tracts carries.

Drought98.3Relatively High at its worst in this ZIP code
Strong wind97.4Very High at its worst in this ZIP code
Landslide95.7Relatively Moderate at its worst in this ZIP code
Heat wave93.8Relatively High at its worst in this ZIP code
Cold wave92.2Relatively High at its worst in this ZIP code
Lightning91.4Relatively High at its worst in this ZIP code
Hail87.3Relatively Moderate at its worst in this ZIP code
Winter weather76.7Relatively Moderate at its worst in this ZIP code
Tornado63.4Relatively Moderate at its worst in this ZIP code
Ice storm61.6Relatively Low at its worst in this ZIP code
Earthquake50.4Relatively Low at its worst in this ZIP code
River flooding48.4Relatively Moderate at its worst in this ZIP code
Wildfire41.9Very Low at its worst in this ZIP code
Hurricane39.9Very Low at its worst in this ZIP code
Compared with Illinois and the United States

State and national columns are figures for those areas, not for this ZIP code. American Community Survey 2019–2023 five-year estimates

This ZIPIllinoisUnited States
Median household income$73,772$81,702$78,538
Income per person$34,600$45,104$43,289
Poverty rate7.9%11.7%12.4%
Median home value$150,700$250,500$303,400
Median gross rent$1,227$1,348
Homeownership88.1%66.8%65%
Bachelor's degree or higher21.6%37.2%35%
Unemployment rate3.6%5.8%5.2%
Works from home3.3%14%13.5%
Born outside the US0%14.4%13.9%
Median age36.938.938.7
Climate

NOAA US Climate Normals 1991-2020, from the nearest weather station with a full year of records. The station and its distance are named above, because a station forty kilometres away describes somewhere else.

Weather stationQUINCY RGNL AP, IL US18.5 km away
Rain in a year36 in

Average high and low by month

January34.6°F / 18.6°F1.57 in rain
February39.7°F / 22.7°F1.77 in rain
March51.7°F / 32.4°F2.29 in rain
April63.7°F / 42.8°F3.98 in rain
May73.3°F / 53.9°F4.55 in rain
June82.4°F / 63.1°F4.5 in rain
July86°F / 66.5°F3.49 in rain
August84.5°F / 64.5°F3.93 in rain
September77.9°F / 56.1°F3.09 in rain
October65.3°F / 44.8°F3.05 in rain
November51.2°F / 33.4°F2.41 in rain
December39.3°F / 23.9°F1.8 in rain
Access to food

USDA Food Access Research Atlas, estimated for this ZIP code from census tract data. Each figure is the share of the ZIP code's land area that falls in a tract carrying that flag.

Low income and far from a supermarketNone of this ZIP code
Far from a supermarketNone of this ZIP code
No vehicle and far from a supermarketNone of this ZIP code
School districts

NCES Geographic Relationship File 2025, which states the association between each district and each ZIP code tabulation area directly. Elementary and secondary districts can cover the same ground, so shares need not total 100%.

This ZIP code is served by 3 school districts, so the address decides which one, not the ZIP code.

Community Unit School District 492.6% of this ZIP code's land area
Warsaw Community Unit School District 3164.8% of this ZIP code's land area
Central CUSD 32.6% of this ZIP code's land area
Community and walkability

CDC/ATSDR Social Vulnerability Index 2022 and the EPA National Walkability Index, both estimated for this ZIP code from census tract data. Vulnerability figures are national percentile ranks, not measurements.

Overall social vulnerability27more vulnerable than 27% of US census tracts
Socioeconomic status19more vulnerable than 19% of US census tracts
Household characteristics61more vulnerable than 61% of US census tracts
Racial and ethnic minority status3more vulnerable than 3% of US census tracts
Housing type and transport43more vulnerable than 43% of US census tracts
Walkability4.4 out of 20Least walkable
Nearby ZIP codes

The closest ZIP codes by centre point, which is not the same as sharing a border.

62376 Ursa, IL7.1 km away
62359 Paloma, IL9 km away
62349 Loraine, IL10 km away
62325 Coatsburg, IL10.4 km away
62338 Fowler, IL11 km away
62348 Lima, IL12.7 km away
62305 Quincy, IL14 km away
62301 Quincy, IL18.7 km away
Location, counties and time zone

County shares from Census 2020 ZCTA relationship files. Time zone from the USDOT National Transportation Atlas, which renders the boundaries written into 49 CFR Part 71.

Adams County95.1% of this ZIP code's land area
Hancock County4.9% of this ZIP code's land area
Time zoneCentral (UTC-06:00 standard)
Daylight saving timeObserved
Land area72.84 sq mi
Water area0.34 sq mi
Population density28 people per sq mi
Latitude, longitude40.0857, -91.2899

Figures are published for this ZIP code or its Census tabulation area unless a section says otherwise. Estimates whose margin of error made them unreliable are omitted rather than shown. Sources: US Census Bureau, CDC, IRS.

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