ZIP Code 48138 — Grosse Ile, MI
48138 is a standard (street delivery) ZIP code serving Grosse Ile, 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 48138 at a glance
| ZIP code | 48138 |
|---|---|
| Primary city | Grosse Ile |
| State | Michigan (MI) |
| County | Wayne FIPS 26163 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 10,344 |
| Coordinates | 42.131560, -83.158600 |
How ZIP+4 works in 48138
The four digits after the hyphen encode a delivery segment inside 48138. 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 48138 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 48138.
| ZIP | City | Distance |
|---|---|---|
| 48183 | Trenton, MI | 3.2 mi |
| 48193 | Riverview, MI | 3.9 mi |
| 48173 | Rockwood, MI | 4.8 mi |
| 48192 | Wyandotte, MI | 5.5 mi |
| 48195 | Southgate, MI | 5.6 mi |
| 48134 | Flat Rock, MI | 7.2 mi |
| 48146 | Lincoln Park, MI | 7.8 mi |
| 48229 | Ecorse, MI | 8.2 mi |
| 48179 | South Rockwood, MI | 8.3 mi |
| 48180 | Taylor, MI | 8.6 mi |
| 48101 | Allen Park, MI | 9.2 mi |
| 48218 | River Rouge, MI | 9.7 mi |
Questions about 48138
What is the ZIP+4 code for 48138?
48138 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 48138, you need to look up a specific street address to get them.
What city is 48138?
48138 is assigned to Grosse Ile, 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.