ZIP Code 45171 — Sardinia, OH
45171 is a standard (street delivery) ZIP code serving Sardinia, Ohio, in Brown 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 45171 at a glance
| ZIP code | 45171 |
|---|---|
| Primary city | Sardinia |
| State | Ohio (OH) |
| County | Brown FIPS 39015 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 5,752 |
| Coordinates | 39.014140, -83.796200 |
How ZIP+4 works in 45171
The four digits after the hyphen encode a delivery segment inside 45171. 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 45171 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 45171.
| ZIP | City | Distance |
|---|---|---|
| 45155 | Mowrystown, OH | 3 mi |
| 45154 | Mount Orab, OH | 7.4 mi |
| 45697 | Winchester, OH | 8.9 mi |
| 45168 | Russellville, OH | 11.2 mi |
| 45121 | Georgetown, OH | 11.8 mi |
| 45679 | Seaman, OH | 12.5 mi |
| 45176 | Williamsburg, OH | 13 mi |
| 45118 | Fayetteville, OH | 13.1 mi |
| 45618 | Cherry Fork, OH | 13.1 mi |
| 45130 | Hamersville, OH | 13.1 mi |
| 45142 | Lynchburg, OH | 13.5 mi |
| 45119 | Feesburg, OH | 14.4 mi |
Questions about 45171
What is the ZIP+4 code for 45171?
45171 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 45171, you need to look up a specific street address to get them.
What city is 45171?
45171 is assigned to Sardinia, Ohio, in Brown 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.