ZIP Code 62221 — Belleville, IL
62221 is a standard (street delivery) ZIP code serving Belleville, Illinois, in St. Clair 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 62221 at a glance
| ZIP code | 62221 |
|---|---|
| Primary city | Belleville |
| State | Illinois (IL) |
| County | St. Clair FIPS 17163 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 29,875 |
| Coordinates | 38.511870, -89.899220 |
How ZIP+4 works in 62221
The four digits after the hyphen encode a delivery segment inside 62221. 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 62221 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 Belleville
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 62221.
| ZIP | City | Distance |
|---|---|---|
| 62225 | Scott Air Force Base, IL | 3.1 mi |
| 62220 | Belleville, IL | 5.5 mi |
| 62226 | Belleville, IL | 5.7 mi |
| 62269 | O'fallon, IL | 6 mi |
| 62243 | Freeburg, IL | 6.5 mi |
| 62258 | Mascoutah, IL | 7.7 mi |
| 62254 | Lebanon, IL | 8 mi |
| 62208 | Fairview Heights, IL | 8.2 mi |
| 62223 | Belleville, IL | 8.8 mi |
| 62289 | Summerfield, IL | 10 mi |
| 62232 | Caseyville, IL | 10.1 mi |
| 62285 | Smithton, IL | 10.3 mi |
Questions about 62221
What is the ZIP+4 code for 62221?
62221 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 62221, you need to look up a specific street address to get them.
What city is 62221?
62221 is assigned to Belleville, Illinois, in St. Clair 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.