ZIP Code 48879 — Saint Johns, MI
48879 is a standard (street delivery) ZIP code serving Saint Johns, Michigan, in Clinton 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 48879 at a glance
| ZIP code | 48879 |
|---|---|
| Primary city | Saint Johns |
| State | Michigan (MI) |
| County | Clinton FIPS 26037 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 18,413 |
| Coordinates | 43.006290, -84.579810 |
How ZIP+4 works in 48879
The four digits after the hyphen encode a delivery segment inside 48879. 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 48879 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 48879.
| ZIP | City | Distance |
|---|---|---|
| 48835 | Fowler, MI | 8.6 mi |
| 48853 | Maple Rapids, MI | 8.7 mi |
| 48820 | Dewitt, MI | 9.9 mi |
| 48866 | Ovid, MI | 10.5 mi |
| 48871 | Perrinton, MI | 11.4 mi |
| 48894 | Westphalia, MI | 12.1 mi |
| 48831 | Elsie, MI | 12.3 mi |
| 48874 | Pompeii, MI | 12.5 mi |
| 48873 | Pewamo, MI | 12.9 mi |
| 48806 | Ashley, MI | 13.1 mi |
| 48807 | Bannister, MI | 13.4 mi |
| 48848 | Laingsburg, MI | 14 mi |
Questions about 48879
What is the ZIP+4 code for 48879?
48879 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 48879, you need to look up a specific street address to get them.
What city is 48879?
48879 is assigned to Saint Johns, Michigan, in Clinton 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.