ZIP Code 45166 — Reesville, OH
45166 is a standard (street delivery) ZIP code serving Reesville, Ohio, in Clinton 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 45166 at a glance
| ZIP code | 45166 |
|---|---|
| Primary city | Reesville |
| State | Ohio (OH) |
| County | Clinton FIPS 39027 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 60 |
| Coordinates | 39.476600, -83.687740 |
How ZIP+4 works in 45166
The four digits after the hyphen encode a delivery segment inside 45166. 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 45166 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 45166.
| ZIP | City | Distance |
|---|---|---|
| 45169 | Sabina, OH | 2.8 mi |
| 45307 | Bowersville, OH | 7.4 mi |
| 45164 | Port William, OH | 7.4 mi |
| 45177 | Wilmington, OH | 8 mi |
| 43142 | Milledgeville, OH | 9.6 mi |
| 45159 | New Vienna, OH | 9.8 mi |
| 45132 | Highland, OH | 10.3 mi |
| 45335 | Jamestown, OH | 10.9 mi |
| 45135 | Leesburg, OH | 11.4 mi |
| 45146 | Martinsville, OH | 12.6 mi |
| 43160 | Washington Court House, OH | 13.7 mi |
| 43128 | Jeffersonville, OH | 14.1 mi |
Questions about 45166
What is the ZIP+4 code for 45166?
45166 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 45166, you need to look up a specific street address to get them.
What city is 45166?
45166 is assigned to Reesville, Ohio, in Clinton 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.