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Zip Code 62305 — Quincy, IL

62305 is a ZIP Code associated with Quincy, IL, located within Adams. The postal region supports an estimated population of 19,036 residents across Data Pending housing units, with a population density of 52.8 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (39.929150, -91.344410)

Data MetricLocal Statistic
Postal / Zip Code62305
Primary CityQuincy
State / ProvinceIL
CountyAdams
Total Population19,036
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density52.8 people/sq mi
TimezoneAmerica/Chicago

How 62305 Compares

MetricZIP 62305Adams CountyIL State Average
Population19,03664,47412,694,745
Median IncomeData PendingN/AN/A
Population Density52.8 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 62301Quincy2.3 mi30,746N/A
Zip 62338Fowler7.1 mi1,075N/A
Zip 62360Payson8.9 mi1,605N/A
Zip 62359Paloma10.1 mi184N/A
Zip 62325Coatsburg12.8 mi465N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →