ZIP Code 62305 — Quincy, IL
62305 is a standard (street delivery) ZIP code serving Quincy, Illinois, in Adams County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 62305 at a glance
| ZIP code | 62305 |
|---|---|
| Primary city | Quincy |
| State | Illinois (IL) |
| County | Adams FIPS 17001 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 19,036 |
| Coordinates | 39.929150, -91.344410 |
How ZIP+4 works in 62305
The four digits after the hyphen encode a delivery segment inside 62305. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 62305 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Other ZIP codes in Quincy
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 62305.
| ZIP | City | Distance |
|---|---|---|
| 62301 | Quincy, IL | 2.3 mi |
| 62338 | Fowler, IL | 7.1 mi |
| 63471 | Taylor, MO | 8.6 mi |
| 62360 | Payson, IL | 8.9 mi |
| 62359 | Paloma, IL | 10.1 mi |
| 62325 | Coatsburg, IL | 12.8 mi |
| 63448 | La Grange, MO | 12.8 mi |
| 62376 | Ursa, IL | 13.2 mi |
| 62365 | Plainville, IL | 13.4 mi |
| 62351 | Mendon, IL | 13.4 mi |
| 62347 | Liberty, IL | 14.2 mi |
| 63461 | Palmyra, MO | 14.4 mi |
Questions about 62305
What is the ZIP+4 code for 62305?
62305 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 62305, you need to look up a specific street address to get them.
What city is 62305?
62305 is assigned to Quincy, Illinois, in Adams County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.