ZIP Code 48045 — Harrison Township, MI
48045 is a standard (street delivery) ZIP code serving Harrison Township, Michigan, in Macomb 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 48045 at a glance
| ZIP code | 48045 |
|---|---|
| Primary city | Harrison Township |
| State | Michigan (MI) |
| County | Macomb FIPS 26099 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 24,061 |
| Coordinates | 42.591210, -82.830170 |
How ZIP+4 works in 48045
The four digits after the hyphen encode a delivery segment inside 48045. 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 48045 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 48045.
| ZIP | City | Distance |
|---|---|---|
| 48043 | Mount Clemens, MI | 2.7 mi |
| 48036 | Clinton Township, MI | 3.5 mi |
| 48035 | Clinton Township, MI | 4.7 mi |
| 48082 | Saint Clair Shores, MI | 5.3 mi |
| 48038 | Clinton Township, MI | 5.7 mi |
| 48047 | New Baltimore, MI | 6.5 mi |
| 48044 | Macomb, MI | 6.5 mi |
| 48051 | New Baltimore, MI | 6.9 mi |
| 48026 | Fraser, MI | 7.1 mi |
| 48081 | Saint Clair Shores, MI | 7.5 mi |
| 48042 | Macomb, MI | 7.7 mi |
| 48066 | Roseville, MI | 7.9 mi |
Questions about 48045
What is the ZIP+4 code for 48045?
48045 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 48045, you need to look up a specific street address to get them.
What city is 48045?
48045 is assigned to Harrison Township, Michigan, in Macomb 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.