ZIP Code 45888 — Uniopolis, OH
45888 is a standard (street delivery) ZIP code serving Uniopolis, Ohio, in Auglaize 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 45888 at a glance
| ZIP code | 45888 |
|---|---|
| Primary city | Uniopolis |
| State | Ohio (OH) |
| County | Auglaize FIPS 39011 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 166 |
| Coordinates | 40.602440, -84.085830 |
How ZIP+4 works in 45888
The four digits after the hyphen encode a delivery segment inside 45888. 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 45888 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 45888.
| ZIP | City | Distance |
|---|---|---|
| 45884 | Saint Johns, OH | 3.7 mi |
| 45895 | Wapakoneta, OH | 4.1 mi |
| 45806 | Lima, OH | 5.5 mi |
| 45870 | New Hampshire, OH | 7.7 mi |
| 45896 | Waynesfield, OH | 7.8 mi |
| 45804 | Lima, OH | 7.9 mi |
| 45819 | Buckland, OH | 9.3 mi |
| 45805 | Lima, OH | 9.7 mi |
| 43331 | Lakeview, OH | 10.5 mi |
| 45334 | Jackson Center, OH | 11 mi |
| 45850 | Harrod, OH | 11.2 mi |
| 45306 | Botkins, OH | 11.2 mi |
Questions about 45888
What is the ZIP+4 code for 45888?
45888 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 45888, you need to look up a specific street address to get them.
What city is 45888?
45888 is assigned to Uniopolis, Ohio, in Auglaize 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.