Residential delivery area · Illinois
ZIP Code 62351: Mendon, IL
ZIP code 62351 uses the postal name Mendon, Illinois and lies mostly in Adams County (95% of its land) with the rest in Hancock County (Census 2020 ZIP-county file). About 1,900 people live there (Census Bureau, ACS 2020-2024). Median household income is $77,298 (Census Bureau, ACS 2020-2024). By Census place, 1% of its land lies in Mendon; 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2021
- ZBP2023
- IRS2022
- Town
- Mendon · its only residential ZIP
- County
- Adams County (95%); Hancock County (5%)
- Census places
- Mendon
- Micro area
- Quincy, IL-MO
- House district
- IL-15 119th Congress
- State
- Illinois
- Time zone
- Central
- Land area
- 72.8 sq mi · 26 people per sq mi
Where is ZIP code 62351?
62351 centers on 40.114°, -91.269° and covers 72.8 square miles of land plus 0.3 of water. It borders 8 ZIP codes: 62349, 62325, 62376, 62348, 62338, 62373, 62320, 62305.
The map draws ZIP code areas only. For the streets inside 62351, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 62351 compare with the rest of Adams County?
| Measure | 62351 | In Adams County | In IL |
|---|---|---|---|
| People (ACS 2020-2024) | 1,928 | 6th of 23 | 683rd of 1,396 |
| Median household income | $77k | not ranked | not ranked |
| Median home value | $148k | 6th of 11 | 563rd of 842 |
62351's median household income is not ranked: its 90% margin of error (±$26,670) is more than a quarter of the figure ($77,298). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 31% of U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 62351?
The 2020 Census counted 1,793 people in 62351; the ACS, which samples households over 2020-2024, estimates 1,928. Between the 2010 and 2020 censuses its population fell 3.4% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 1,928±301 (90% margin)
- 2020 Census count
- 1,793−3.4% since 2010 (1,856)
- Households
- 759
- Median age
- 39.9
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 62351?
Of the 1,928 people the ACS estimates in 62351, 25.9% are under 18 and 18.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (97.7%).
- Under 1825.9%
- 18 to 6455.7%
- 65 and older18.4%
- White, not Hispanic97.7%
- Other or two or more1.7%
- Hispanic or Latino0.6%
- Black, not Hispanic0.0%
- Asian, not Hispanic0.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 62351 earn?
Median household income is $77,298 (ACS 2020-2024). It is not measurably different from 2015-2019 ($74,210 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $77,298±$26,670
- Income per person
- $37,871
- Below the poverty line
- 9.7%
- Unemployed (of the labor force)
- 3.4%
- Adults 25+ with a bachelor's degree
- 20.4%
- Adjusted gross income per tax return, 2022
- $69,485880 returns; wages 69% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 62351?
- Median home value (owners' estimate)
- $147,800
- Median gross rent
- $667
- Homes owned by their occupants
- 86.6%
- Housing units
- 823
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 62351?
35 business establishments had a location in this ZIP code in 2023, 6 more than in 2018; the most are in other services (except public administration) (ZIP Code Business Patterns).
- Other services (except public administration)8
- Construction6
- Retail trade6
- Wholesale trade3
- Finance and insurance3
- Accommodation and food services3
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 62351?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 62349 | Loraine | 517 | $68k | 5.7 mi |
| 62325 | Coatsburg | 465 | $76k | 7.3 mi |
| 62376 | Ursa | 1,276 | $58k | 7.3 mi |
| 62348 | Lima | 204 | $78k | 7.5 mi |
| 62338 | Fowler | 1,075 | $92k | 8.1 mi |
| 62373 | Sutter | 225 | $111k | 10.3 mi |
| 62320 | Camp Point | 2,667 | $77k | 11.4 mi |
| 62305 | Quincy | 19,036 | $84k | 13.4 mi |
| 62359 | Paloma | 184 | $51k | 6.1 mi (near) |
| 62380 | West Point | 360 | $75k | 9.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.