ZIP Code 48890 — Sunfield, MI
48890 is a standard (street delivery) ZIP code serving Sunfield, Michigan, in Eaton 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 48890 at a glance
| ZIP code | 48890 |
|---|---|
| Primary city | Sunfield |
| State | Michigan (MI) |
| County | Eaton FIPS 26045 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 2,055 |
| Coordinates | 42.768780, -84.971670 |
How ZIP+4 works in 48890
The four digits after the hyphen encode a delivery segment inside 48890. 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 48890 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 48890.
| ZIP | City | Distance |
|---|---|---|
| 48861 | Mulliken, MI | 3.8 mi |
| 48875 | Portland, MI | 6.5 mi |
| 48849 | Lake Odessa, MI | 8.4 mi |
| 48897 | Woodland, MI | 9.2 mi |
| 49096 | Vermontville, MI | 9.3 mi |
| 48837 | Grand Ledge, MI | 10.5 mi |
| 48822 | Eagle, MI | 11.6 mi |
| 48851 | Lyons, MI | 13 mi |
| 48894 | Westphalia, MI | 14.2 mi |
| 48876 | Potterville, MI | 14.6 mi |
| 48813 | Charlotte, MI | 14.6 mi |
| 49073 | Nashville, MI | 15 mi |
Questions about 48890
What is the ZIP+4 code for 48890?
48890 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 48890, you need to look up a specific street address to get them.
What city is 48890?
48890 is assigned to Sunfield, Michigan, in Eaton 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.