ZIP Code 48237 — Oak Park, MI
48237 is a standard (street delivery) ZIP code serving Oak Park, 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 48237 at a glance
| ZIP code | 48237 |
|---|---|
| Primary city | Oak Park |
| State | Michigan (MI) |
| County | Oakland FIPS 26125 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 29,318 |
| Coordinates | 42.464940, -83.182410 |
How ZIP+4 works in 48237
The four digits after the hyphen encode a delivery segment inside 48237. 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 48237 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 48237.
| ZIP | City | Distance |
|---|---|---|
| 48070 | Huntington Woods, MI | 1.4 mi |
| 48069 | Pleasant Ridge, MI | 2 mi |
| 48072 | Berkley, MI | 2.3 mi |
| 48075 | Southfield, MI | 2.4 mi |
| 48220 | Ferndale, MI | 2.5 mi |
| 48235 | Detroit, MI | 2.7 mi |
| 48067 | Royal Oak, MI | 2.9 mi |
| 48221 | Detroit, MI | 3.1 mi |
| 48076 | Southfield, MI | 3.3 mi |
| 48073 | Royal Oak, MI | 3.9 mi |
| 48030 | Hazel Park, MI | 4.3 mi |
| 48219 | Detroit, MI | 4.5 mi |
Questions about 48237
What is the ZIP+4 code for 48237?
48237 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 48237, you need to look up a specific street address to get them.
What city is 48237?
48237 is assigned to Oak Park, 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.