ZIP Code 48101 — Allen Park, MI
48101 is a standard (street delivery) ZIP code serving Allen 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 48101 at a glance
| ZIP code | 48101 |
|---|---|
| Primary city | Allen Park |
| State | Michigan (MI) |
| County | Wayne FIPS 26163 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 27,925 |
| Coordinates | 42.259760, -83.210670 |
How ZIP+4 works in 48101
The four digits after the hyphen encode a delivery segment inside 48101. 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 48101 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 48101.
| ZIP | City | Distance |
|---|---|---|
| 48146 | Lincoln Park, MI | 1.9 mi |
| 48122 | Melvindale, MI | 2.2 mi |
| 48125 | Dearborn Heights, MI | 3.1 mi |
| 48217 | Detroit, MI | 3.2 mi |
| 48124 | Dearborn, MI | 3.3 mi |
| 48229 | Ecorse, MI | 3.7 mi |
| 48120 | Dearborn, MI | 3.7 mi |
| 48180 | Taylor, MI | 3.8 mi |
| 48195 | Southgate, MI | 3.8 mi |
| 48218 | River Rouge, MI | 4.1 mi |
| 48192 | Wyandotte, MI | 4.3 mi |
| 48128 | Dearborn, MI | 4.9 mi |
Questions about 48101
What is the ZIP+4 code for 48101?
48101 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 48101, you need to look up a specific street address to get them.
What city is 48101?
48101 is assigned to Allen 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.