ZIP Code 45721 — Coal Run, OH
45721 is a standard (street delivery) ZIP code serving Coal Run, Ohio, in Washington 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 45721 at a glance
| ZIP code | 45721 |
|---|---|
| Primary city | Coal Run |
| State | Ohio (OH) |
| County | Washington FIPS 39167 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 15 |
| Coordinates | 39.565630, -81.583470 |
How ZIP+4 works in 45721
The four digits after the hyphen encode a delivery segment inside 45721. 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 45721 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 45721.
| ZIP | City | Distance |
|---|---|---|
| 45715 | Beverly, OH | 3.6 mi |
| 45744 | Lowell, OH | 4.4 mi |
| 45786 | Waterford, OH | 5.7 mi |
| 45727 | Dexter City, OH | 7.7 mi |
| 45746 | Macksburg, OH | 7.7 mi |
| 45729 | Fleming, OH | 10.4 mi |
| 45788 | Whipple, OH | 11.9 mi |
| 43787 | Stockport, OH | 12 mi |
| 43724 | Caldwell, OH | 12.1 mi |
| 45750 | Marietta, OH | 12.4 mi |
| 45784 | Vincent, OH | 13.4 mi |
| 45745 | Lower Salem, OH | 14.1 mi |
Questions about 45721
What is the ZIP+4 code for 45721?
45721 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 45721, you need to look up a specific street address to get them.
What city is 45721?
45721 is assigned to Coal Run, Ohio, in Washington 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.