ZIP Code 62864 — Mount Vernon, IL
62864 is a standard (street delivery) ZIP code serving Mount Vernon, Illinois, in Jefferson 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 62864 at a glance
| ZIP code | 62864 |
|---|---|
| Primary city | Mount Vernon |
| State | Illinois (IL) |
| County | Jefferson FIPS 17081 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 22,779 |
| Coordinates | 38.330410, -88.902720 |
How ZIP+4 works in 62864
The four digits after the hyphen encode a delivery segment inside 62864. 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 62864 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.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 62864.
| ZIP | City | Distance |
|---|---|---|
| 62872 | Opdyke, IL | 6.9 mi |
| 62830 | Dix, IL | 8.6 mi |
| 62898 | Woodlawn, IL | 8.7 mi |
| 62889 | Texico, IL | 9.8 mi |
| 62814 | Bluford, IL | 9.8 mi |
| 62816 | Bonnie, IL | 10.3 mi |
| 62894 | Waltonville, IL | 11.1 mi |
| 62893 | Walnut Hill, IL | 11.7 mi |
| 62810 | Belle Rive, IL | 12.2 mi |
| 62846 | Ina, IL | 12.7 mi |
| 62853 | Kell, IL | 12.9 mi |
| 62851 | Keenes, IL | 14.5 mi |
Questions about 62864
What is the ZIP+4 code for 62864?
62864 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 62864, you need to look up a specific street address to get them.
What city is 62864?
62864 is assigned to Mount Vernon, Illinois, in Jefferson 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.