Quincy, IL ZIP codes

2 ZIP/ZCTAs intersecting this Census place in Adams County.

ACS 2023 population

39,188

Median household income

$56,372

Median home value

$146,100

U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: Census place Quincy (GEOID 1762367). Methodology

Combined population of ZIP/ZCTAs intersecting this place: 50,064 (2 ZIPs).

Combined population of ZIP/ZCTAs intersecting this place. Each intersecting ZIP contributes its full ZCTA population; overlap percents are descriptive only. This is not the Census place ACS headline above. Methodology

Map of Quincy, IL

Census place boundary and intersecting ZIP Code Tabulation Areas for Quincy, IL — Census place boundary for Quincy, IL. Intersecting ZCTAs may extend past the city limit. Not a USPS city limit. Boundaries: U.S. Census Bureau. Methodology · Data sources

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ZIP/ZCTA overlap with Quincy

Population overlap

Share of each ZIP/ZCTA’s population located within Quincy, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.

6230199.3%
USPS primary city
6230543.0%
USPS primary city

ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology

ZIP codes intersecting Quincy

ZIP	City	County	Population	Income
62301	Quincy	Adams County	30,987	$52,212
62305	Quincy	Adams County	19,077	$80,918

USPS associates these ZIPs with Quincy

These codes list Quincy as a primary or acceptable city. They are not used for the ACS headline.

ZIP	City	County	Population	Income
62306	Quincy	Adams County	397	—