ZIP Code 48137 — Gregory, MI
48137 is a standard (street delivery) ZIP code serving Gregory, Michigan, in Livingston 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 48137 at a glance
| ZIP code | 48137 |
|---|---|
| Primary city | Gregory |
| State | Michigan (MI) |
| County | Livingston FIPS 26093 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 4,157 |
| Coordinates | 42.461910, -84.073670 |
How ZIP+4 works in 48137
The four digits after the hyphen encode a delivery segment inside 48137. 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 48137 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 48137.
| ZIP | City | Distance |
|---|---|---|
| 48169 | Pinckney, MI | 6.3 mi |
| 49285 | Stockbridge, MI | 6.8 mi |
| 48118 | Chelsea, MI | 10.5 mi |
| 48843 | Howell, MI | 10.6 mi |
| 49259 | Munith, MI | 10.9 mi |
| 48130 | Dexter, MI | 11.4 mi |
| 48143 | Lakeland, MI | 11.5 mi |
| 48819 | Dansville, MI | 12.3 mi |
| 48892 | Webberville, MI | 13.1 mi |
| 48139 | Hamburg, MI | 13.5 mi |
| 49240 | Grass Lake, MI | 13.8 mi |
| 48836 | Fowlerville, MI | 14.3 mi |
Questions about 48137
What is the ZIP+4 code for 48137?
48137 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 48137, you need to look up a specific street address to get them.
What city is 48137?
48137 is assigned to Gregory, Michigan, in Livingston 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.