ZIP Code 45327 — Germantown, OH
45327 is a standard (street delivery) ZIP code serving Germantown, Ohio, in Montgomery 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 45327 at a glance
| ZIP code | 45327 |
|---|---|
| Primary city | Germantown |
| State | Ohio (OH) |
| County | Montgomery FIPS 39113 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 9,315 |
| Coordinates | 39.632860, -84.398410 |
How ZIP+4 works in 45327
The four digits after the hyphen encode a delivery segment inside 45327. 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 45327 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 45327.
| ZIP | City | Distance |
|---|---|---|
| 45325 | Farmersville, OH | 4.4 mi |
| 45042 | Middletown, OH | 6.2 mi |
| 45342 | Miamisburg, OH | 6.5 mi |
| 45330 | Gratis, OH | 7 mi |
| 45345 | New Lebanon, OH | 7.3 mi |
| 45005 | Franklin, OH | 8.5 mi |
| 45449 | Dayton, OH | 8.7 mi |
| 45070 | West Elkton, OH | 9 mi |
| 45417 | Dayton, OH | 9.3 mi |
| 45381 | West Alexandria, OH | 9.6 mi |
| 45439 | Dayton, OH | 10.1 mi |
| 45428 | Dayton, OH | 10.5 mi |
Questions about 45327
What is the ZIP+4 code for 45327?
45327 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 45327, you need to look up a specific street address to get them.
What city is 45327?
45327 is assigned to Germantown, Ohio, in Montgomery 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.