ZIP Code 45365 — Sidney, OH
45365 is a standard (street delivery) ZIP code serving Sidney, Ohio, in Shelby 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 45365 at a glance
| ZIP code | 45365 |
|---|---|
| Primary city | Sidney |
| State | Ohio (OH) |
| County | Shelby FIPS 39149 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 28,965 |
| Coordinates | 40.282800, -84.155820 |
How ZIP+4 works in 45365
The four digits after the hyphen encode a delivery segment inside 45365. 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 45365 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 45365.
| ZIP | City | Distance |
|---|---|---|
| 45360 | Port Jefferson, OH | 4.7 mi |
| 45353 | Pemberton, OH | 6 mi |
| 45340 | Maplewood, OH | 8.3 mi |
| 45302 | Anna, OH | 8.6 mi |
| 45356 | Piqua, OH | 9.2 mi |
| 43343 | Quincy, OH | 9.6 mi |
| 45333 | Houston, OH | 9.6 mi |
| 45326 | Fletcher, OH | 10.3 mi |
| 45317 | Conover, OH | 10.4 mi |
| 43070 | Rosewood, OH | 11.3 mi |
| 45845 | Fort Loramie, OH | 12.1 mi |
| 45306 | Botkins, OH | 12.2 mi |
Questions about 45365
What is the ZIP+4 code for 45365?
45365 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 45365, you need to look up a specific street address to get them.
What city is 45365?
45365 is assigned to Sidney, Ohio, in Shelby 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.