ZIP Code 48203 — Highland Park, MI
48203 is a standard (street delivery) ZIP code serving Highland Park, Michigan, in Wayne 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 48203 at a glance
| ZIP code | 48203 |
|---|---|
| Primary city | Highland Park |
| State | Michigan (MI) |
| County | Wayne FIPS 26163 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 20,049 |
| Coordinates | 42.421760, -83.103100 |
How ZIP+4 works in 48203
The four digits after the hyphen encode a delivery segment inside 48203. 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 48203 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 48203.
| ZIP | City | Distance |
|---|---|---|
| 48221 | Detroit, MI | 2.4 mi |
| 48212 | Hamtramck, MI | 2.5 mi |
| 48238 | Detroit, MI | 2.6 mi |
| 48030 | Hazel Park, MI | 2.8 mi |
| 48220 | Ferndale, MI | 3 mi |
| 48206 | Detroit, MI | 3.2 mi |
| 48234 | Detroit, MI | 3.3 mi |
| 48202 | Detroit, MI | 3.5 mi |
| 48091 | Warren, MI | 3.9 mi |
| 48211 | Detroit, MI | 4 mi |
| 48069 | Pleasant Ridge, MI | 4 mi |
| 48204 | Detroit, MI | 4.4 mi |
Questions about 48203
What is the ZIP+4 code for 48203?
48203 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 48203, you need to look up a specific street address to get them.
What city is 48203?
48203 is assigned to Highland Park, Michigan, in Wayne 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.