ZIP Code 48442 — Holly, MI
48442 is a standard (street delivery) ZIP code serving Holly, Michigan, in Oakland 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 48442 at a glance
| ZIP code | 48442 |
|---|---|
| Primary city | Holly |
| State | Michigan (MI) |
| County | Oakland FIPS 26125 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 22,788 |
| Coordinates | 42.793160, -83.602240 |
How ZIP+4 works in 48442
The four digits after the hyphen encode a delivery segment inside 48442. 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 48442 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 48442.
| ZIP | City | Distance |
|---|---|---|
| 48350 | Davisburg, MI | 5 mi |
| 48430 | Fenton, MI | 7.5 mi |
| 48439 | Grand Blanc, MI | 8.7 mi |
| 48356 | Highland, MI | 9.5 mi |
| 48462 | Ortonville, MI | 9.7 mi |
| 48357 | Highland, MI | 9.9 mi |
| 48383 | White Lake, MI | 10.1 mi |
| 48438 | Goodrich, MI | 10.3 mi |
| 48346 | Clarkston, MI | 10.3 mi |
| 48348 | Clarkston, MI | 10.4 mi |
| 48411 | Atlas, MI | 10.5 mi |
| 48451 | Linden, MI | 10.9 mi |
Questions about 48442
What is the ZIP+4 code for 48442?
48442 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 48442, you need to look up a specific street address to get them.
What city is 48442?
48442 is assigned to Holly, Michigan, in Oakland 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.