ZIP Code 62002 — Alton, IL
62002 is a standard (street delivery) ZIP code serving Alton, Illinois, in Madison 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 62002 at a glance
| ZIP code | 62002 |
|---|---|
| Primary city | Alton |
| State | Illinois (IL) |
| County | Madison FIPS 17119 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 29,543 |
| Coordinates | 38.939880, -90.128290 |
How ZIP+4 works in 62002
The four digits after the hyphen encode a delivery segment inside 62002. 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 62002 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 62002.
| ZIP | City | Distance |
|---|---|---|
| 62018 | Cottage Hills, IL | 3.1 mi |
| 62024 | East Alton, IL | 4.4 mi |
| 62010 | Bethalto, IL | 4.5 mi |
| 62095 | Wood River, IL | 6 mi |
| 62035 | Godfrey, IL | 6.2 mi |
| 63386 | West Alton, MO | 6.8 mi |
| 62012 | Brighton, IL | 7.2 mi |
| 62067 | Moro, IL | 7.5 mi |
| 62084 | Roxana, IL | 7.7 mi |
| 62021 | Dorsey, IL | 8.3 mi |
| 62087 | South Roxana, IL | 9 mi |
| 63138 | Saint Louis, MO | 10.1 mi |
Questions about 62002
What is the ZIP+4 code for 62002?
62002 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 62002, you need to look up a specific street address to get them.
What city is 62002?
62002 is assigned to Alton, Illinois, in Madison 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.