ZIP Code 48002 — Allenton, MI
48002 is a standard (street delivery) ZIP code serving Allenton, Michigan, 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 48002 at a glance
| ZIP code | 48002 |
|---|---|
| Primary city | Allenton |
| State | Michigan (MI) |
| County | St. Clair FIPS 26147 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 3,120 |
| Coordinates | 42.939160, -82.926010 |
How ZIP+4 works in 48002
The four digits after the hyphen encode a delivery segment inside 48002. 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 48002 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 48002.
| ZIP | City | Distance |
|---|---|---|
| 48003 | Almont, MI | 5.8 mi |
| 48014 | Capac, MI | 5.9 mi |
| 48005 | Armada, MI | 6.1 mi |
| 48041 | Memphis, MI | 6.2 mi |
| 48022 | Emmett, MI | 8.5 mi |
| 48065 | Romeo, MI | 8.7 mi |
| 48062 | Richmond, MI | 8.9 mi |
| 48444 | Imlay City, MI | 10.8 mi |
| 48428 | Dryden, MI | 11.2 mi |
| 48027 | Goodells, MI | 12.3 mi |
| 48096 | Ray, MI | 12.3 mi |
| 48050 | New Haven, MI | 12.4 mi |
Questions about 48002
What is the ZIP+4 code for 48002?
48002 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 48002, you need to look up a specific street address to get them.
What city is 48002?
48002 is assigned to Allenton, Michigan, 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.