ZIP Code 48880 — Saint Louis, MI
48880 is a standard (street delivery) ZIP code serving Saint Louis, Michigan, in Gratiot 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 48880 at a glance
| ZIP code | 48880 |
|---|---|
| Primary city | Saint Louis |
| State | Michigan (MI) |
| County | Gratiot FIPS 26057 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 9,994 |
| Coordinates | 43.458000, -84.571350 |
How ZIP+4 works in 48880
The four digits after the hyphen encode a delivery segment inside 48880. 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 48880 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 48880.
| ZIP | City | Distance |
|---|---|---|
| 48615 | Breckenridge, MI | 5.4 mi |
| 48883 | Shepherd, MI | 7.6 mi |
| 48801 | Alma, MI | 7.6 mi |
| 48662 | Wheeler, MI | 9 mi |
| 48832 | Elwell, MI | 10.8 mi |
| 48637 | Merrill, MI | 12.1 mi |
| 48847 | Ithaca, MI | 12.9 mi |
| 48859 | Mount Pleasant, MI | 13.4 mi |
| 48877 | Riverdale, MI | 14.2 mi |
| 48862 | North Star, MI | 14.4 mi |
| 48640 | Midland, MI | 14.6 mi |
| 48858 | Mount Pleasant, MI | 15.6 mi |
Questions about 48880
What is the ZIP+4 code for 48880?
48880 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 48880, you need to look up a specific street address to get them.
What city is 48880?
48880 is assigned to Saint Louis, Michigan, in Gratiot 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.