Quincy, IL ZIP Codes
Quincy, Illinois has 3 ZIP codes: 2 for street addresses ( and ) and 1 for PO boxes ().
Your street decides which one you use.
Which Quincy ZIP code is my address in?
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Quincy ZIP code map
Tap or point to an area to see its ZIP code.Full-size map
62306 has no area on the map: it is a PO box or single-organization ZIP code. Dashed line: Quincy city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
All Quincy ZIP codes by type
| ZIP | Type and post office or station |
|---|---|
| 62301 | street delivery Quincy |
| 62305 | street delivery Quincy |
| 62306 | PO boxes at the Quincy post office Quincy |
Why your mail may say Quincy when you live outside it
Quincy ZIP codes also cover Melrose Township, Ellington Township and Fall Creek Township, so a letter addressed to Quincy can go to a home outside the city limits.
A ZIP code does not set your city, school district or tax. Adams County property records show which city you are in.
Quincy ZIP code questions
What is the main ZIP code for Quincy?
62301, the ZIP code of the main Quincy post office at 3535 Locust St.
Which Quincy ZIP codes are for PO boxes only?
62306. Mail to it goes to boxes at the post office, not to street addresses.
What county is Quincy in?
Adams County.
ZIP codes for towns near Quincy
More towns near Quincy: Florissant, Chesterfield, Wildwood, Pekin, Ballwin, Jefferson City, University City, St. Louis, Peoria.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections