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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2023

ZIP Codes for City of Quincy, IL

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Counties:ADAMS, IL
Area Code(s):217, 447
Timezone(s):Central (GMT -06:00)
City Population:40,633 (More Details)
CBSA:Quincy, IL-MO
Congressional District(s):15
Land Area:855 square miles (county)
Water Area:16 square miles (county)

3 ZIP Codes

Quincy, IL ZIP Code Boundaries

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Quincy, IL Covers 3 ZIP Codes

ZIP CodeTypePopulation% of PopulationAliases
62301Standard33,75865.16%BURTON, MARBLEHEAD
62306P.O. Box00.00%

Quincy, IL Demographic Information *

Total population**40,633
Male population19,465
Female population21,168
Median age (years)39.4
White Population36,904
Black Population2,197
Indian Population75
Asian Population368
Hawaiian Population9
Hispanic Population584
Median age (Male)37.5
Median age (Female)41.3
Total households17,151
Family households (families)9,964
Average household size2.25
Average family size2.92
Total housing units18,655
* Demographic data is based on 2010 Census for the City of QUINCY.
** City and ZIP Code Population will not be equal due to differences in their geographies.


  1. U.S. Postal Service [Last Updated: 2/1/2023],
  2. Internal Data Creation [Last Updated: 2/1/2023],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],