ZIP Code 62351
About Mendon
Mendon is a village in Adams County, Illinois, United States. The population was 872 at the 2020 census. It is part of the Quincy, IL–MO Micropolitan Statistical Area.
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Area Profile
US Census (ACS 5-year · Gazetteer)
2,026
population
$73,772
median household income
28
people / sq mi
$150,700
median home value
$661
median gross rent
36.9
median age
835
housing units
767
households
72.8
land area (sq mi)